On June 1st I had unprotected sex and I know he came inside me. On June 7th I started a light period but then it became almost normal. My period was supposed to start on the 10th. The period ended on the 10th. It is now June 18th. I do at times feel sick. Headache on and off for a few days now. & as of tonight I’ve started cramping but my period isn’t for another 3 weeks