Ive had my period on August 22 it usually lasts for five days but this time it only lasted four days. Me and my husband is trying to have a baby! Now my breast are painful, pains in my lower part of my back and I'm having pains underneath my stomach. Ive noticed that my navel is sticking out more. I had this same problem for a while took two pregnancy test and both were negative. Can you help me?