I'm scared my BF might not be the father of my unborn child. &' 20 weeks on Friday and doctors say my due date is 2/10/17 my lmp was 4/6-11 Ultrasound tech said my conseption was 4/20. I was with my BF all threw May and he *** in me every time. We separated and I got with my ex 4-23/24 not sure on date. I saw him finish in his hand. I got back with my BF 4/25 and we had sex and he *** in me, could my ex be the father?