I Have Been Taking Wellbutrin For Six Months, And Am

I have been taking wellbutrin for six months, and am experiencing a side effect of redundant repetitive thoughts that cycle on a 10 second loop like a hamster stuck in a wheel. I'm taking the wellbutrin for depression, and it works well for that, but I have to take trazodone to sleep because The time release wellbutrin makes my brain stay fully engaged. This repetitive thought cycle loop pattern I'm experiencing is disconcerting but relatively harmless. It certainly does not seem normal. Is this a common side effect for people taking this pharmaceutical? Is there anything I could do to reduce this side effect? I've tried to make it stop by focusing my attention to the fact that I'm doing itand will my brain to stop doing it, but it keeps happening all day long. Can you suggest anything? Thank you for any response you can give