Had a great date yesterday, actually a bucket list event.  I’ve noticed that after a great date with my atf (or other great date) I’m feeling down for a few days. I’ve noticed it especially after an overnight or vacation date.  It’s like the “normal” world is so boring and I wish every day could be like a great date day.  I know it’s a chemical thing with oxytocin, Adrenalin, and dopamine, but I’m wondering if others (clients and providers) have these highs and lows, and, how do you handle them.  Or, is it just me being stupid.

It’s a high! I just got back from a FMTY & I feel the same way! It takes a few days to get back to reality. It’s an erotic high it’s totally natural. Don’t be so hard on yourself. Plan your next erotic adventure, so you have something fun to look forward too!

I think this happens a bit to most people after a big game day, concert, anticipated event, etc. That dopamine is a helluva drug

Coming back down after a great date can be a real transition, and honestly, there’s no right or wrong way to feel. Everyone processes it differently. For me, I usually ride a bit of a high for a few days i.e. the anticipation before, the fun during, and even the day after feels kind of peaceful, like I’m still soaking it all in again.  
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What has helped me avoid that post-date “dip” is doing something productive and fun, like writing the review and reliving the great moments all over again. It gives me something to look forward to and keeps the good feelings going a little while longer.
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Then, when that wears off, I start looking ahead and doing my research for my next date, as I love that process as well. It’s a pattern that I have adopted that works for me but it was trial and error at first for sure.
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But honestly, how you feel is how you feel and there’s no need to beat yourself up about it. A lot of what we experience post date is, as you are saying, influenced by more than just our thoughts as psychology, biology, chemistry, pharmaceuticals, the stresses of work life, etc can all play roles, sometimes in ways we cant possibly fully understand.  
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Just know it’s valid,  fleeting and "normal" for you. I am certain you're not alone in feeling this way.

into my schedule, which happens when I have one that I'm seeing weekly, I have always seen providers on Tuesdays, Thursdays and Saturdays.  (The link below confirms this from 9 years ago.)  Because this compresses the time between providers to about 48 hours, I often book ahead one or two sessions past the one I have today.  With this approach, there is no "high" to come down from because when I leave a session (incall or outcall) I'm already thinking about the next one, which is already booked.  Being in a constant state of anticipation about the next date cancels any "coming down off the high" from the last date.  

That sounds like the opposite of what the OP is describing. You were "walking on air" for several days before coming back down to earth. The OP made it sound like he crashed almost as soon as the actual experience ended.
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I think I've experienced BOTH sorts of reactions to events in real life (and TER life). Some pleasant memories last forever. Some pleasant experiences end too soon.

I rationalise it this way. I remind myself I’m getting the best of this person for a short period of time. If I was to live with this person it wouldn’t be way that. So I just enjoy it and look forward to the next time.

It sounds like you may yearn for dating to be more regular. Even the busiest of guys here sees maybe two ladies a week. Most even less. Financially, it’s hard to do more. But if you have the means, you can try an exclusive or Sugar Baby. If not, maybe get on some dating apps and try to find a girlfriend.

had a SB, either.  Am I right?  I don't think you use dating apps either, but here you are, for the third time in recent weeks, recommending the same in s condescending way to some other monger.  Lol

After a great date, I bask in the memories.  The feelings and scents linger in my mind.

the "scents lingering in your mind" is to refrain from washing your mustache for a while and those scents will linger right under your nose, which is infinitely better than in your mind.  Lol

always gets a laugh out of the girls when they go to wash my face in the farewell shower.
I stop them and tell them; your scent helps me remember you later^^!

I don't have one and am living proof that "those scents" also "linger right under your nose" on the skin itself, sans mustache.. I recall many times driving home whilst enjoying it.

Thats an awesome way to keep the addiction satisified. Do you ever think what will happen when this is not possible...what happens then?

1)  That I run out of money and my dick still works, or . . . .  

"The other half I wasted."