Bleeding 4 weeks later..Sorry for TMI

Kristina
I'm calling the dr in the morning but just wondering if anyone else has experienced this. I gave birth to my daughter on March 17th at 31w2d. I hardly bled at all after her birth. About 2 days ago I started bleeding lightly, figured it was my first period. This afternoon I went to the bathroom, and there was more blood then in the last two days and a clot in the toilet. Several hours go by with what I consider normal period bleeding. We went to see our daughter in the NICU, we got home around 9 I go to the bathroom with a 3/4 full pad and another clot. That's happened twice since being home.  I've had a miscarriage 2 Christmases ago and it's kinda reminding me of how that went. Could this just be my body realizing I've given birth already and it's cleaning itself out? Has anyone experienced anything similar?