I just started my period late last night and ever since I have felt very light headed. it seems very heavy already (changing my pad/tampon every hour, 2 max!) and i have a lot of small clots. my period was normal until around 3 months ago and they have gone to only lasting 3 or 4 days with heavy bleeding. but this is the first time ive felt light headed. and it doesnt really go away.

any ideas???