I was supposed to start my period 2/28 and I was almost a week late when I started it. It only lasted a few days and I only had cramps the first day. I don't know if I have symptoms because I have scoliosis but I do get nauseous over certain foods that I haven't really beforemy breasts are tender and I have lower abdominal pain and I'm no longer on my period. We didn't use protection one time and I know that one time can do it. My boyfriend is positive I'm not. I just want to make sure