Ok so my LMP was July 2-6. It was a 27 day cycle. I had sex with my BF July 7 a day after my period and another guy July 11. Then my BF again July 15, 17 or 18. On July 15 I noticed I had sore breast but paid no mind to it thinking it was way to early for pregnancy symptoms from the 11th. Ho could be the father of my child?