I'm not sure of your age ... BUT when i turned 35 my periods that were a breeze suddenly turned to hell ... hug clots too (sorry for TMI) ... and my Doctor said it can be quite common for woman when they get past the 35 age mark ... anyway, after about 2 year of my periods being very heavy they got much better (hardly ever get clots) ...but i still can no longer stand using tampons which never bothered me before !!

(Also the GP told me i didn't eat enough red meat ???)