Guys help me out in what's happening here. My husband was back from the Air Force during Christmas break. The last time we had sex was like Jan. 1-2 and I got a period about 2-3 days later and lasted my normal 5 DAYS. And now I'm an entire period week behind schedule from my period this month (fen), my nipples are sore, my boobs are swollen, but I have a negative pregnancy test. What's up with me???