Cock rings

Long story short:  My doctor has me on adderall for Adult ADD. I was diagnosed with Adult ADD because I'm basically a fuckup at work, can't concentrate, took a shitload of years to graduate college, etc. And the medicine helps. But I'm having a tough time keeping an erection. Which obviously sucks. I beat around the bush with my doc and she told me that I'm too young to be on a drug like Viagra but that stimulants like Adderall can cause ED. So I've got a hard on that'll go soft in the time it takes to move from bj to DATY to time for sex. I got a membership here because I was thinking an escort would be a good low-stress way to work through a problem like this.

And my question:  I read about cock rings and how they can help with maintaining erections. Which is what I need. I get hard one. They're just not as strong as they used to be and it's embarrassing. Is a cock-ring a no-no with providers?  I don want to use one so I can go all night without a pop. I just want it to give me a little help. If I go with the disposable ones would that typically be allowed by a provider?  Sorry for going on and on.  Any advice would be a big help.