Hello, I have a seven day cycle. What day would I start ovulating? Im also concerned because I had sex with two guys in I had sex on the 26 of DEC, and the 1st of Jan. However, this guy says he did not cum in me. I have recently got back wit my boyfriend which was the 8th of Jan and had sex from that day on. Unprotected. I just wanted to know which guy could be the father. Really scared because my boyfriend believes the baby is his. He doesn't know I had sexual intercourse with another man. Please help me out. Thank you very much