Confused PLEASE HELP

Lately I have been having abdominal issues. One night in the middle of the night I woke up in a lot of pain my stomach was hurting and I was trying to poop but it hurt too bad and it wasn’t like a constipation like my anus actually hurt. It also hurt to pee but not in a bladder infection way because I’ve had one and it didn’t feel like that, it hurt like at the top of my V area like right under my stomach where my lady parts start. I tried to go back to sleep and I slept the pain off and when I woke up I felt better but I still felt pressure on my lower abdomen and bladder. A couple of days passed and I feel normal but every time I masterbate and reach orgasm I get extremely bad cramps right after that last about 5-10 minutes. No blood just cramps. I’ve never had that problem before. I just recently kinda stopped taking my birth control so I don’t know if it’s from that or something else. For a moment I thought it was pregnancy but I took a test and it said negative and I haven’t really been active. I have also been having mucus like discharge which is not very normal for me. Any ideas on what this could be??