Unprotected sex

My bf & I had sex this morning and we ran out of condoms so he didnt have one on, i didnt think he'd cum bc it was literally 2 strokes in & out & he came. But i have been worrying all day bc im 16 & do not want or need or can afford a child right now. 
I took the plan b pill 7 hours after we had sex & im just so scared like damnit i regret it. 
Ive been crying all day & just need assurance that everything "will" be okay😞😞