Input for drs appointment?

The past 2 years since the birth of my second child sex is sooo painful. It’s not that I’m not wet, I just get stabbing pains inside almost like he’s hitting my cervix over and over again but it’s moreso my uterus. It was tolerable though. After birth of baby girl these pains are 10fold PLUS every few times we have sex it’s like tissue comes out. Like pictured - that’s not a blood clot it’s actual tissue of some sort. The time before this I didn’t get a picture but it was a gray color flesh piece. My doctor keeps dismissing my concerns so I’m trying one more time today at my appointment to ask her for help. This is the 3rd doctor I’ve been to and they all keep telling me there’s nothing wrong. I need help though, somethings wrong. Any suggestions?

(Sorry my toilet is dirty. I separated with my husband because he had been having an emotional affair and this was right after I came home...,, obviously he didn’t clean toilets while I was gone 🤮) also posing anonymously because I don’t want to be attacked but if comments are kind I’ll respond to comments and turn anonymous off