My husband and I have been trying to get pregnant since January, but my cycle has been very irregular. This month, I was supposed to start on Sunday and took a digital pregnancy test on Tuesday morning, which was negative. I started my period that Thursday and it was unusually light and had stopped by Saturday. I was even thinking of taking another test, when my period started back up again. It was spotting at first for a couple of days then started to get heavier over the weekend. It is Monday and I have had fairly heavy bleeding for me (a regular tampon about every three to four hours). I have been having bleeding now for almost two weeks and today I had some clots of blood, not really big but clots. I have a doctor appointment on August 1, but I was wondering if I take another pregnancy test now would a positive result indicate that I am probably miscarrying and shoud go to the doctor sooner, or is it just possibly a really long period that has gotten progressively worse?