About 3 weeks. Ago I had unprotected sex with my boyfriend and now my period is like 5 days late. Every time I take a test it comes up negative. I even have pregnancy symptoms such has bloating, cramping, fatigue, food craving, and headaches. I can't afford to go to a doctor and I need some advice. Could I be pregnant or is it all in my head. My last period was on Jan.29 and we had sex on Feb. 10. And I haven't had my period since!