Nervous

So I always freak myself out but I'm concerned I may be pregnant. My bf and I had unprotected sex but he pulled out. about 4 days before my period I had brownish pink discharge for 2 days and then it stopped (my period usually lasts 5-7days). I have yet to get my period and I'm currently 5 days late. I had a few pms symptoms (some cramping and sore nipples) I've taken two tests, the first was negative and the second I swear a see a line but my boyfriend doesn't. I was thinking about taking another test this weekend if my period still hasn't come. I guess I'm curious if I'm just being paranoid or if i should actually be concerned...