I had my period from the 5-8th of feb, this was late and i didnt get a period in january at all which is unusual for me. i went on the pill on 12th feb but had unprotected sex twice 13th feb and stopped taking the pill 13th feb. I started spotting and bleeding lightly 18th feb. A urine test for pregnancy came up negative and i know that this is too early to tell. i have been having nausea, headaches and tiredness for a week now as well as abdominal cramping. I am still spotting and bleeding today. Could i be pregnant?