I had unprotected sex 9/16 and was experiencing lower abdominal pain and almost cramp like pain in my uterus. Later that day and 9/17 I was a little worried so I took plan b on 9/18. Now a week later I've experienced Sharp pain in my stomach when I drink a lot of water. I feel a little bloated and just a lot of random stomach pain. I smoke, and lately been working 12hr shifts. Idk what is wrong with me? My periods irregular but I had it around the 25 of last month, today date is 9/23.