hi greetings...
as per the information provided by you the problem of
OCD is a longstanding condition, associated with repeated obsessions and compulsions..
and as you are already on several drugs like
fluoxetine, inosert etc which are not making you feel better, it's better to add on low dose antipsychotics which may makes you feel better
and getting the side effect profile generally Side Effects depend on the dosage of drug rather than number of drugs, sweets better to take antidepressant along with low dose antipsychotic instead of taking high dose of antidepressant which causes more side effects...
and as you have mentioned that you will reduce the dose after six to eight months and then stop the medication which is bringing back your irrelevant thoughts, it's better to continue very low dose of antidepressants after you start feeling better...
attending several sessions of cognitive
behaviour therapy related to OCD also makes you feel much better...
have a morning walk daily and exercise for 2 to 3 days in a week...
good luck for your future endeavours
hope I solved your query and feel free to ask any further...