you are definitly not having two periods. You may just be much heavier than usual, the excess tissue is pretty normal being as that is what your getting rid of during a period. Worst case it may be a mc, but I would probably go to a clinic or planned parenthood to get checked just in case...hope everything works out
not a problem!! i would definitly go for a check up just in case, its always good to have some sort of answer... ;-)