Hi, As there is history of unprotected intercourse, if you missed your expected date of periods, there is a possibility of pregnancy. The next common possibility is premenstrual syndrome. In which due to the fluctuation of reproductive hormones, breast tenderness, backache, bloating sensation of the abdomen, constipation, spotting, etc. can be seen. Rare possibilities are thyroid hormone abnormalities or fluctuations in serum prolactin levels. Possibly you may get the periods soon. If you do not get periods, even after one week, please go for a urine pregnancy test once. Depending on the result of the test further treatment can be planned. If the symptoms recur in next menstrual cycle with increasing severity, you may need evaluation. In that case, please consult your gynecologist once, get examined and go for investigations like, hemoglobin, blood sugar level estimation, thyroid profile, serum prolactin levels, ultrasound, etc. This will help in finding the possible cause and treatment can be taken accordingly. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN