Pregnant?

Okay, so for the majority of my life was spent as a gay female. Just this summer I delve into the world of heterosexuality. I had sex without a condom 3 times & now I don't know how to check if I'm pregnant or not. JUST TO BE SAFE. Also , yes I know I can just buy a pregnancy test but my dad and brother would KILL ME if they found out. Is there/are there any other ways to see if i potentially could be pregnant? Please help I'm a lesbian who bangs dudes i dont know what to do 🙈