I've tried Haldol and it just stopped working after a while, horrible side effects too. My psychosis is that I have bad thoughts about wanting to hurt people on a daily basis, even sometimes have urges to act on them but I will never act on them.
Thanks for clearing that up.
If these intrusive thoughts are all the symptoms you experience, you wouldn't fulfil the criteria for schizoaffective disorder. You would not actually be considered psychotic for experiencing them, however horrible it may be.
It would however explain why you were put on an SSRI at first, since that is used to treat intrusive thoughts. If this does nothing, the next course of action would be prescribing an antipsychotic, which apparently has not been sufficient either. If it causes mania or full blown schizophrenia, the next course of action would also be antipsychotics (you see, the pharmaceutical repertoire of modern psychiatry is quite limited), but for a different reason. Antipsychotics can be prescribed for intrusive thoughts, bipolar disorder (mostly during mania), schizophrenia (maintenance and higher doses during episodes) and schizoaffective disorder.
You should absolutely make sure that the right diagnosis has been made and possibly go and try to find an expert in the field where you live or at least get a second opinion by another experienced psychiatrist.
Did the paroxetine simply worsen your existing symptoms (the intrusive thoughts) or did it add a pletora of other symptoms? If you went into a manic/schizophrenic episode, I can see how the diagnosis schizoaffective disorder would be made. If not, I still don't see why you aren't just considered to suffer of intrusive thoughts.
Sorry if I'm asking so many questions, but to even begin to understand what has been going on, one has to hear the full story. If you simply want the initial question answered (was xtc the cause) then I'll get off your back (nobody can tell, but it's extremely unlikely that it did eventhough it surely contributed).
The problem is that there aren't really many treatment options for you right now. Imho you should DEFINITELY try to get psychotherapy if your health insurance covers it. It is indicated for intrusive thoughts, but it might be tricky to get therapy for psychotic disorders, depending on where you live. Psychotherapy has next to no side effects, therefore can only help you and tries to tackle the problem from a completely different side, so you should not miss out on that if there's any chance to get it. It won't be a miracle cure though, but you will very likely see considerable benefits in it.
The other option would be electroconvulsive therapy, if you absolutely cannot live with this and it continues to get worse. It's something that should very carefully be considered since some damage CAN occur. However for some people this IS a miracle cure, side effects or not. If pharmacological treatment options are exhausted, you should speak to your doctor about this and then read read read and decide if you feel comfortable to go down such a road.
You should first try to give yourself some time. This might turn out to be an episode that will eventually subside (sorry, I'm not sure if this is true since you only gave us a very rough time frame).
I also don't know how crippling the disorder currently is for you. Can you work and socialize? Would you have financial support if you don't work? You should try to find some sort of stability, so you can focus on how to get better or at least how to live with the symptoms.
I hope you get better, man! Being psychotic can be very tough on many levels and everyone who has experience with this will feel for you.