then i had sex the next day with a different guy and we had sex the 19th and the 20th. I know when i ovulated to i ovulated the 18th 19th and 20th and i had three of them days? Posted: 4 hours ago by a BabyCenter Member I think the only way to know for sure would be a dna test on this one. 0 out of 0 found this helpful Post Answer this question