who’s the dad ?

Just recently found out I’m pregnant , my last period started on January 3 .. but the thing is I’m not sure who the dad can be , there’s 2 guys involved I had sex with guy A multiple time throughout the month ( Jan12,Jan20,Jan28) we didn’t use any type of protection neither did he pulled out and I wasn’t on birth control either , second guy B we didn’t had sex but we were messing around he was jerking off I didn’t noticed wether he came or not but after that about 5-10 mins later he fingered me (I might just be overly thinking this thru ) but who do you think the dad can be ? I already know that the only way to know for sure is to get a paternity test .. is there even a chance for guy B to be the dad ? I’m just really confused bc I was with guy A for a year or so and we always used the pulled out method and never gotten pregnant. I don’t know if this might help but on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> it says my fertile window was from Jan 16-22 . please no rude comments , just let me know if I’m overly thinking this