thought about creating a similar thread a while back - would be interesting to get some more opinions about this.
I think any drugs which relies on serotonin for its effects can be risky. this will include most empathogens and psychedelics, including mushrooms. Psychedelics can also be a problem for some with DP/ DR as a trip can definitely worsen these symptoms. There's an argument that a low dose trip might be able to have a positive effect on someone with abuse symptoms, but the risks are obvious and should be weighed up. I would personally wait until all anxiety has cleared before tripping with higher doses. I think opiates and possibly ketamine (although K also has a minor effect on serotonin, I think) would be less "damaging", unless they are abused of course, but that's just a guess.
I would personally stay away from weed as well. Based on the way it effects me atm, it isn't something my body wants. It has a weird psychelic feel these days, and makes me get paranoid and twitch constantly. Not a nice feeling at all. Test it out and draw your own conclusions if you want - but best skip it imo.
I lot of people seem to be okay with getting drunk once in a while, since it helps the reintegrate socially after traumatic post-mdma-abuse experiences. I even do this from time to time and find it to be a good social lubricant even in these circumstances. It's very difficult for me to socialise without - which means there is abuse potential. A lot of people, such as myself, have kept up their smoking habits (been on and off for the past few months - hard to quit when your mood see-saws). I have a feeling smoking and drinking, despite being legal and available, both have a negative effect on recovery, but I can't back this or any of my other opinions up with much evidence. I remember reading somewhere that head injury victims who continue to drink during the first year of recovery, do not recover to the same extent. This may involve daily consumption rather than occasional, but it's best with these things to err on the side of caution.
More important than finding some new drug to fill the enormous void left by MDMA and the come down, is to figure out what caused you to indulge in the way you did in the first place. This goes for me and most people in this situation (obviously excluding the unlucky few who get screwed up on a pill or two). Despite not enjoying weed anymore, I spent a good` 2-3 months initially smoking weed 2-3 times a week just because I needed something to alter my consciousness, which may well have affected my recovery. It's key that people who have a tendency to go too far figure what the root cause of this is, otherwise you will always be in risk of bringing back old symptoms or replacing MDMA abuse with some other kind of abuse.
Good luck OP