Quoting Noneya Business:" I didn't get my period last month. I wasn't pregnant though. I've been having some problems for a while ... [snip!] ... and even the texture was skin-like. It was about an inch and a half long and maybe a half inch wide. Does this sound normalish?"
Stop using tampons. Tampons hold the blood up to the cervix and that can help develop clots as well as cause them to "fuse" (for a lack of better words) together. If you want a clear assesment of what your period is doing, use pads. It will give you a much better idea.
I used to get pretty hefty clots once in a while and extremely painful periods. I do have endometriosis. I have already had the initial laproscopy for the proper diagnosis and removal. It is back. I am on the depo shot until January when they remove my uterus. My case is a tad extreme. It isn't so much the endometriosis that is getting me the partial hysto, it is a combination of that and a blood disorder.