I had unprotected sex on 2nd of January and 4 days later I got my period, a normal 7 day one. However, I still worry that I may be pregnant because some women report still having period when they're are pregnant! I took a HPT test which was negative on 6th Feb. however, I am having cramps for 5 days now and also back pain but no period. Can i be pregnant ir am i just so stessed that my body create symptoms?