You don't say how long you've been on these meds and it may just be the adjustment period you're dealing with right now.
Please call your doctors office and let them know about these symptoms. You may just have to wait these out or perhaps your dosage needs adjusting.
When you say that you think about one thing until it's solved and then you need think about something else..........that sounds pretty normal to me. I think most of us do the same thing. Unless you mean that you worry something to death and then move on and worry about something else, that would not be so great and if that's the case, that is what your doctor needs to know.
Let us know what he has to say, OK?
Peace
Greenlydia