damn condoms someone help?!!!!!!

soo im on the pill (just barely 2 weeks) but i've quickly discovered it isnt for me because my life is just too hetic so i haven't been on schedule & today my boyfriend and i had sex with a condom on, but right after he finished in the condom in me, it slipped off in my vagina!?! (trust me it sucked to get out & ITS NEVER happened to me!) how stressed should i be?