I started my period on the 28th July and they ended on the 1st aug. I had sex with my ex partner on the 8th of August then had sex with a new partner on the 10.11&12th unprotected but he did not ejacualte inside of me. I then had sex with my ex partner again on the 15th of August who DID ejaculate inside of me. I need peace of mind who is more likely to be the father? I am not proud of this!
Normally you will ovulate between days 11 and 16 of your cycle. Sperm can survive up to about 5 days. The egg is viable for up to 48 hours after ovulation.
You had sex with your ex on day 11.
You had sex with the new guy on day 13, 14, and 15. Since he didn't ejaculate he is less likely to be the father but there is ALWAYS a chance with any unprotected contact.
You had sex with your ex again on day 18.
It could be either of them. You need a DNA test.