what is going on?!

my fertile window started Wednesday the 10th and went to today. Thursday and Friday was my most fertile and my husband and I had intercourse Sunday the 7th then again Wednesday night and Thursday night. today I've been experiencing mild cramping almost like I'm going to start my period plus in having a discharge. the discharge looks between a brown and a reddish color. my period is not till the 25th. I would like to know if anyone can give me some insight. yes when we had sexual relations I had the ovulating discharge.