Girls, hi! It's been six months since I had my baby, last week I notic…

Girls, hi! It's been six months since I had my baby, last week I noticed that sometimes my belly hurts, like during my period, but it hasn't happened yet and for the whole week it hurts sometimes too, plus on top of that (sorry for the details) there's some strange discharge that comes out abundantly, clear, or slightly white. And today during sex it became painful (in my usual positions), panic struck me, why is this happening? I haven't experienced this before, I'm going to see a gynecologist, can you tell me if anyone has had something similar, what did they do? What could it be? ?