still need help!!

I'm on CD 18. I ovulated on CD 11. we bd'd the 3 days prior to ovulation, and also on O day. it's been 7 days.. I'm having brown spotting. I started spotting on Friday. stopped Saturday, and started again this morning. I have mild cramps. like menstrual cramps but not as bad. idk what's going on? my body is playing tricks on me! it's too early to test so I can't know if it's IB. and it could be my hormones because I had my IUD taken out august 27. has this happened to anyone else? what happened after? bfp or af?