So on the 30th of Nov I had unprotected sex. Then on the 8th of Dec I got what seemed like a period except it was a little lighter and shorter (I usually have a heavy period) also didn't have any cramps and I usually have awful ones. Now the last week I've had random naseua. Lipton tea made me sick to my stomach and the smell of cooking hotdogs made me run to the bathroom and I usually love them! I've also had scattered headaches and my breasts just started to get sore. Is it possible that I'm pregnant? My cycle is usually 7-8 days long and not always regular. I'm 23. Thank you