For moms that may know after having a child.

So I am 5 weeks postpartum and after not seeing my husband for a week we had sex yesterday. (Yes I should of waited to go to my first dr appointment) but we couldn't help it. This morning when going to the bathroom I had a blood clot and my lower insides feel kinda like there moving around? Idk how to explain it. Is this normal after the first time you have sex?