Worst. period. ever

Okay so I've always had fairly heavy periods and they were always irregular. But since I started this pill in march they have been a little less heavy and always on time. 
This month my period is weird. It's SUPER heavy, like exaggeratingly heavy. There are a lot of clots in it, it hurts my stomach and back and it smells!! Usually my periods are only 3-4 days long and usually by day 3 it's lighter but it's day 3 and it's still super heavy. Today the pain in my abdomen was to bad I had to rush to the bathroom to throw up. I'm not too sure what's going on but it's weird and I'm kinda worried .... advice, encouragements, or thoughts?