C.B.
Hi M., Absolutely, you should call your doctor. Are you trying to get pregnant? I also went thru a very unusual period that turned out to be an ectopic pregnancy, and I didn't have a clue I was even pregnant........who thinks that, when they're having a period that lasts 13 days? (Not trying to scare you). The point is, when in doubt, consult your doc!
Good Luck!