Can OCD cause ADD symptoms? I have trouble concentrating in school even when OCD thoughts are gone. I can focus on things that interest me though.

Not cause,associated. It's not that OCD causes ADD symptoms, but more of an association between the two. I see that you are on two antidepressants as well as stimulant treatment for ADD. Keep up your appointments with your prescribing physician to evaluate your response to medications and potentially offer other useful cognitive behavior therapies.