I only have two bowel movements in one week, is that normal?

It can be: Everyone is different and that can be in the normal range. Has this always been your pattern? If not, that would suggest something's affecting your frequency. Lots of meds can, which isn't an uncommon cause, and even more often it's our diet. Make sure you're having plenty of water, high fiber in your diet. Try adding prunes or prune juice. If these don't help, talk with your doctor. Good luck.