TMI!!!!!

I'm 13 dpo. Not supposed to start until the 29th. When I was 10 dpo I had a small spot of blood. Thought maybe implantation. Last night I had bad cramps and my boobs hurt. I took a test this morning, bfn. A few hours later I was bleeding so I figured it was my period. And had consistent craps that hurt so bad. Had a tampon in for about 4 1/2 hours. Took it out and there was only a tiny bit of red blood and alot of thick brown slimy stuff. I checked my cervix and it is still high and soft. Any ideas???