Conception

This is my first baby and I don’t understand everything when it comes to conception but I had sex jan 29 and febuary 4th . I don’t want leave out that I have irregular cycles. My baby was due on the 26th but had baby on the 9th due to PROM! Doctor said I conceived on or about Feb. 3 . Which one could’ve led to my conception? I’m sorry guys im 18. The guy from the 29th thinks he wore a condom. But around 11:32pm on febuary 4 going into the 5th I had sex but before I inserted some lubrication gel due to dryness.