<s>[INST] Hi, I have been having cramps in my stomach and my sides, but they are not menstrual cramps. I had my period, but it was lighter and not as long as usual. Me and my husband had sex about 4 days before my period. Also I have been having bad headaches and sleepy. Could I be pregnant? [/INST] Hello, and I hope I can help you today. Any woman who is having unprotected sex is at risk for pregnancy. Pregnancy symptoms can vary widely between women, however these can be confused with the symptoms of PMS or other hormonal issues. In addition, many women have some spotting in the early part of pregnancy, which can be confused for a menstrual cycle. So I think at this point it would be best for you just to do an over-the-counter pregnancy test. These tests are very accurate in diagnosing pregnancy even within three weeks of conception. If this is negative, I would advise you to watch and wait and see what happens with your cycle going forward, and if it continues to be irregular you may want to see your gynecologist for evaluation. I hope I was adequately able to answer your question today, and that my advice was helpful. Best wishes,  </s>