Over-focused ADD + OCD + Depression and Anxiety

Hi everyone.

When I met my boyfriend over a year and 3 months ago, he was just starting to come off of Paxil, being treated for OCD, Depression and Anxiety. The reason he said he was coming off the medication is because his body "didn't tolerate" the medicine anymore. He was feeling really good at 80mg, but 6 months later had to start lower the dosage (and this was probably about 4-5 years ago).

For the past year or so, he has been on other medications (SSRIs), but none of them seem to help. The psychiatrists had him on Zoloft, Celexa, Prozac, Lexapro, Luvox, and a few others I can't remember. More recently he went through a series of tests, trying to decipher what the underlying issue may be. He went to the Pfeiffer Treatment Center in Chicago to have a series of tests done, then he contacted a doctor in Virginia who told him to work on re-building his immune system so that his body could tolerate medications again. He's in pain every day because there is no relief from these "symptoms" which we aren't even sure if it's a side effect from the medication or symptoms of the mental illness(es) themselves.  Some of these include headache, over-stimulation (acastisia), general pain...

Does anyone have any ideas on who we can contact to try to get to the bottom of this?? I would really appreciate it. Thanks.