I had unprotected sex with my bf last week of august. I usually have 28 day cycle and somehow bleed heavy on 1st day. I had a light bleeding on sept 10 for 3 or 4 days with nothing at night. Then i started feeling that im always hungry and i eat twice of what i usually eat and sometimes not even enough. I also had headache and nauseous last week maybe because of reading pregnancy signs. Now is oct and im suppose to have my period yesterday and its still light and nothing last night. I took pregnancy test last week of sept and it was negative.