If zoloft (sertraline) wasn't effective enough for my ocd on 200mg , nor luvox 200 mg ; what can i try? would another ssri work ?

Ask your care giver: Assuming you have an ongoing relationship with one or more therapists (you should), they are the best people to make recommendations about other medication, since your individual characteristics can sometimes make one or more medicines either appropriate or completely wrong for you. If you aren't getting good guidance from them, find someone who can help better with your meds. It can help a lot.

I don't think so: All the ssris quite similar mechanisms of action so it is doubtful that another one would help. Unfortunately there are no truly effective meds for ocd although sometimes adding a low dose antipsychotic med might help. Specialized psychotherapy is the best way to go [ask if your psychotherapist thinks that he or she can help].