First period after d&c?

Sarah
TMI warning.... It's been 6 weeks since my d&c, and my period started last night. It is absolutely horrendous! Like,  it started with a gush of blood while I was driving home from work. Soaking through my underwear and shorts!! 
I also have some fairly large clots. A few were 1.5 inches in diameter, I'm guessing.
Has anyone else had a similar experience? It's calmed down a bit this AM, but I was debating calling my doctor just to be save.