Better explained Help!

Makayla

So I had sex with my bf on the 9th and got my period the day after and then had sex with my ex on the 26th and had another period about a week and half later now I’m pregnant supposedly 4 weeks and 5 days but another doctor told me 5 weeks and 4 days so who do you think it is or should I just wait for another ultrasound

ALSO I DID NOT CHEAT MY BF KNOWS AND WE ARE FIGURING IT OUT TOGETHER 💯SAID HE’D STILL BE HERE 100%