Hi! I encourage you to tell your therapist about the antidepressants not working. But I think you already know you need to stay away from these other recreational drugs. I'm sure they are not helping the situation.
I encourage you to keep working with professionals until they and you see what is happening. It sounds a bit like bipolar disorder to me--or the results of using those other drugs for a long time, if you did.
Things can get better. Often it's a matter of finding the right drugs in the right dosages. Hang in here!