I am pregnant and I don't know who the father is, My last perdiod was on 30 of january and I have sex with my ex and my new boyfriend on the same day on 10 of february and also had sex on 13 february with my ex boyfriend
It could be either.
You normally will ovulate between days 11 and 16 of your cycle. If your period started on 30 January, then that would have been between Feb 10 and 15.
Sperm can survive up to about 5 days. The egg remains viable for about 48 hours.
You'll need a DNA test to confirm paternity.
Hope it helps, good luck.