I hope someone can help me. Well, I have been haveing unprotected sex very oftently. I haven't got my period and I have most of the symptoms except one. I've token three pregnancy test's and only one came back positive. Last month I did get my period, it was very light and after I had some brown spottings. I aldo did go to the doctors, twice and they toke me some urine test and still negative. They say blood test's aren't neccasery if urine test come back negative. I also do have to linea nigra. I have gained weight as well. When I bend down to clean or something I have this feeling in my stomach. What do you guys think? Help.