I'm pretty sure I know who jst seeing what others think

Okay so I had a one night stand an we use a condom but he "said" it broke that was on April 16 but I got back together a week later with my ex boyfriend and had sex multiple time before may 1 witch is the first day of when my period started my period Lasted 1-5 of may then me and my ex boyfriend I got back with had sex again a lot of times no protection everytime and with no birth control found out I was pregnant may 26 I would have been around 3-4 weeks pregnant so it would be my ex boyfriends I know for a fact just seeing what others think so that the other guy will shut up I use the conception date calendar and it said I conceived around may11-18 what would y'all think