Are they active on social media?  Recent ter reviews?

Sounds like you are contacting them appropriately, but they may not be active or taking new clients.

Wouldn't read too much into it.

Sometimes providers are busy and they might miss an email. Had that happen to me once or twice. Usually the best way to go about it is writing a (polite) follow-up email once, *maybe* twice, asking about your inquiry, and asking if there was anything else they needed from you. Shows that you're proactive and accommodating.

I would say the first follow-up should happen 48-72 hours after the initial inquiry, depending on the day you sent it (weekends they might be really busy).  

Usually that's enough. I think there's only been one provider I've attempted to meet that was really bad with communications, and she was one of those "choosy" types that blew me off after a while.

a couple of months ago i was trying to set up an appointment and come to find out the lady took a vacation.  

I would move on at this point

Good luck

Regardless of reviews recent or not, social media helps.  
I think it’s uncool when ppl don’t reply either way.  
Maybe the email went to spam , after a few times I wouldn’t reach out anymore.

This happens way more to me now than it used to! Scheduling time for this is very tricky too, so I now have like 2 appointments a year if I'm lucky. It's not just you.

Depending on who you’re contacting, it’s possible that the several days’ notice might not be enough.

As a rule, I respond to all inquiries, generally the same day to a day later, depending on how far out the date being requested is. Many of my dates are booked 1 to 3 weeks in advance, though, so when an inquiry is most likely to fall through the cracks is when it’s for several days away and for a day I don’t have availability.

That said, when I have availability, I’m happy to take short notice dates, so I don’t discourage same-day queries.