Hello I really need some help advice I made a awful mistake was going through a bad time with my…

Hello I really need some help advice I made a awful mistake was going through a bad time with my boyfriend and went and slept with my ex I'm 5 weeks away from giving birth all the dates match up to my boy being the dad but I keep getting anxiety thinking what if he's not I think it's the guilt and fear of it not being his it's made ne mussrible my hole pregnancy it's on my mind 24 7 and it's now driving me insane I have been online calinders of what day did I convive I wrote my due date and it comes up exact day Me and my boyfriend had sex . what was the 24th of April . I slept with my ex on 6th of may done a test on the 16th of may and it said 3 weeks plus .. after I had sex with my boyfriend a few hours after I bleed and I think this was a sign of the sperm hitting the egg .. plus I knew I was pregnant before I done the test as I just knew by symptoms and another online chart said on the 24th was my Peak time . like I said it all adds up to be mu boyfriend but I think I need to hear it from someone else as I'm suffering awful anxiety I know I made a mistake and it's made me realise who I really want and love so please don't judge me just please help me