My last "real" period was April 12. The ONLY day I had sex that month was 28. My periods are 32-34 day cycle. The next due date on my period should have been around the 15 or so but I had bleeding for 24 hours on the 10. I am never early! And my periods last 3-4 days. The next time I had sex was on the 19 of May. My ovulation week for April was from 27-02. I had an ultrasound done on aug 23 and it said 16w4d. This was not done by the same person as the next one. The second one was done by my doc I now and it was on sept23 and it said 19w5d. The first one was right on the mark of April 28. The 2nd put conception on May 8 10 days later! I think the bleeding I had was implantation bleeding but my doc is using it as a period and I'm concerned the due date he has is way off- feb 14 and that's w the 2 weeks added. Again, I did not have sex until may19 the second time. I know ultrasounds can be off 2 weeks either way and the second ultrasound is right in the middle. 10 from the 28 of April and 11 days from May 19. Help! Who's the father April guy or May guy?

Likely April guy. But the only way to know for sure is a DNA test after birth.

With all those numbers and dates in there it's hard to tell.

What is your actual due date? February 14? If that is the case, then the estimated date of conception is May 24 or 25. Remember that this is strictly an estimate and a DNA test will have to be done to confirm paternity.