Hi girls, I need a bit of help. I've gotten myself into a bit of a mess and just need to ease my mind. My last period was March 12th and it lasted to the 15th. I slept with an old flame March 13 through March 16 (he pulled out). On March 17th my husband and I got back together and had sex at least once a day throughout the rest of the month. On April 12th, I found out I was pregnant. My cycles are generally 28-30 days long with my ovulation being around day 16 or so. (I tracked my cycles for a few months.)
Based on my LMP, my due date is December 17th. I went for an ultrasound at 13 weeks and the babies measurements put me at December 18th. Is this reliable? It seems really unlikely that my flame would be the father, I just need some other opinions. Please don't judge me, I know I made a mistake:(