HELP HELP HELP PLS🤧 Chances of me getting pregnant!?!?

! Okay so I had sex tonight (unprotected) and background on me: my body doesn’t produce enough hormones so I’m on a very Low dose of B/C to help rise them.... I have also been told I will have a hard time if even to be able to have kids..... I am on week 3 of the pills

Should I get plan B?

Should I take a pregnancy test??

Please help I don’t know what to do🤧😪