Hello. I had sex with my bf 2 weeks back. We had unprotected sex. He says he thinks he half pre-ejaculated in me. I took the ipill for safety the next day within 24 hours. After taking ipill I got a pain in my chest for some time and then it became normal. sometimes I feel vomit too. My period is due in this week but till now I haven't got it. What the conditions that i'm facing. Am I pregnant? When will my periods resume. please help me out as i'm a bit worried.