<s>[INST] I am late on my period...last period was 08/07/10..I had sex on 09/05/10..seen slight spotting 09/20/10..abdominal cramping and pain similiar to a period but no quite..but still no period..is it possible that I may be pregnant based on my last period and the date I have sex which was the only day I have had sex this year? [/INST] Hello and Welcome to ‘Ask A Doctor’ service.I have reviewed your query and here is my advice.You just do the urine pregnancy test if there is a single line do not worry, this is periods probably.That is dysmenorrhea pain during periods.Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Sheetal Agarwal </s>