What's going on? Scared

Well I had unprotected sex the day of my ovulation but he pulled out before he was even close and he peed before. Anyway it's 16 dpo and no period. I took a pregnancy test today and got a clear negative. I took one at 11 dpo and got a negative. So if I'm not pregnant wheres my period?! I've had no AF or pregnancy symptoms really. Around 12 dpo I got sore boobs alittle (only on the bottom) and since 4 dpo my left nipple has hurt and only my left nipple. Yesterday (15 dpo) my right nipple started to hurt.. No bigger boobs, no darker nipples, no veins, no bleeding, no cramping, nothing... No nausea either. No tiredness... So what's going on??