Talking to Mom... advice

I have a great relationship with my mom and I just started having sex with my bf. Two things

a) he was in me for 10 second about without a condom and i am freaking out abt pregnancy. idk why i did it i’m a horny teen but it was 2 days after my period ended and eve said i was NOT ovulating yet but that’s unpredictable

he did not cum

b) i want to ask my mom for the pill but am terrified to do so, any advice?

can someone please calm my nerves i’m getting a pregnancy test tmo.