Hello. I Have Two Guys I'm Dating. Had Sex With

Hello. I have two guys I'm dating. Had sex with the first guy on the 16th on the first day of my off safe period . I can't remember if I used contraceptive. Then I met my second guy on the 20th and we had sex. I used postinor 2 on the 22nd morning and on the 23rd night. I'm feeling pregnant now. I don't know who the father is. The first guy or the second guy. I also want to know if the postinor I took will affect the baby or cause any harm or deformity.