I had unprotected sex 2 weeks before my period. I'm on the pill but was not able to take my pill that night but took it the next day. I rarely get a period anymore due to the birth control pill I'm on which the gyno doctor said was normal. I took a pregnancy test the day of my period and it came out negative then took another a week after again being negative. I've been looking up signs and feel some of the symptoms but it may be because I'm siking myself out and looking for a little headache or back ache or mood swing. I'm just wondering if according to this information would my negative test results be reliable?