Hi, a few weeks ago i had sex the day before my period, i did get it right around the right time, but it was so much lighter than usual and about a day or two shorter. Now my breasts and nipples are sore and it's two weeks before my next period is even due. My breasts are always tender before my menstrual cycle, but it feels like a different kind of soreness, and way too early. I occasionally have started getting light lower back pains, and now I'm having excessive white gooey discharge. I haven't noticed any fatigue, but I do seem to be getting small headaches and something just doesn't feel right. I did a pregnancy test after my light period, about 5-9 days after the intercourse, but it came up negative. Could I have been testing too soon? Now It's been about 18 days since the intercourse, should I try testing again? Or wait until my next cycle is supposed to start?