question: hi Doc, im 25 yrs old unmarried girl. I am on medication of Krimson 35 as prescribed by my docter. On 4Feb I had sexual intercourse with my boyfriend. I also took I Pill within an hour after that. I have heard that Krimson 35 a birth control tablet. Is that so? Am i safe from getting pregnant. I got my menses on 24 Jan & got over on 29 jan.