Hi ladies, I'm needing some advice, I cheated on my boyfriend around the time I conceived. It was a big mistake and I wish I could go back and change things, but I'm unsure of who the father is. I'm pretty sure it's my boyfriends based off my first ultrasounds, but the dates are pretty close. I had my period May 7th and had sex with the other man May 18th and 19th, I was with my boyfriend May 21st, 22nd, and the 23rd. I ovulated on May 22nd. I know the only sure way to know is through a DNA test which I plan on getting. But I just wanted some advice.