My last period was Dec 8th .I had protected sex with guy A once on Dec 15th. It was a mistake we also check for leaks.i had unprotected with guy B on 18th,19th,20th,21th,22th,23rd,24th,25th, we was tryin to conceived. I have my period every 29 days regular basis. Now I'm 28 weeks pregnant who's the father