The first day of my last period was on June 17th. My cycles are anywhere between 32-34 days. I slept with somebody on July 5th without protection, and also somebody else on July 19th. I took a home pregnancy test on July 20th and all 5 came back positive. There would be no possible way the July 19th time would be the father of my baby, right? Also, I had an ultrasound done on August 11th and the baby showed a flickering heart beat.

Any help would be appreciated!!
Thanks!