Infection on the inside?

Hi mamas! So I had my csection May 26 this year and healing was going great! I had my 6 week check up, cervix was closed and was cleared to do anything that I used to do before getting pregnant. 3 days after that me and my boyfriend had sex and it was pretty painful but we took it slow. We did it one more time the next day and it was still painful so we haven't done it since. I am 8 weeks PP now and am having some weird cramping pains in my uterus along with the smallest amount of blood and clear discharge. It dosent smell but today I had a more yellowish discharge? Also, if I pee when my bladder is full, its kinda painful on the inside? Anyone else have this happen? Im seeing my OB tmro but just curious. Thanks!

One picture is natural daylight and the other is with some lights on.