Heavy HEAVY period after coming off of BC?

Lindsey
Came off of BC combination pills mid December. Had a light period the week after coming off (dec 15-17), very short and light, I know it was probably a withdrawal bleed. So AF showed up yesterday, had a normal day yesterday, and then today was god awful heavy. Like "someone killed a small animal in my underwear" heavy this morning. Soaked through 3 super plus tampons today. 
What the heck? Anyone else have this? Hope tomorrow isn't this heavy!!!