If you have had normal periods and skipped it for 3 months and it started again. Wouldn't it be heavy with clots in it? *no medication or anything*

Not necessarily... If a woman didn't ovulate for a couple of months, built up a thicker uterine lining, and then sloughed it all over a few days, it would be logical to expect a heavy period. But maybe not all of the lining is coming off, maybe it's coming off over many days, or maybe the bleeding is from the cervix area and not a true period. Sounds like it would be best to see the obgyn doc to make sure all is ok.