Emergency contraception

So yesterday I got kicked out of my house. I’m about 15 and I was super upset and went to my boyfriends house. He spent the whole day comforting me. I didn’t want him telling his parents so he didn’t. we stayed in his room all day. I cried and he comforted me n we did homework and napped and whatnot. Then later that night we had sex but the condom ripped but I was just so into it that I said keep going and to just pull out. That was a big mistake. He pulled out but he said he wasn’t sure he pulled out all the way. I started freaking out and calling myself a idiot. My period just ended that day so i would’ve waited a whole month! He said he pulled out but maybe not all the way and about half got in there. I was already pretty stressed out about my parents so he said to focus on that and we’ll deal with this later. I somehow convinced my mom to let me stay with her and so I went to school. My boyfriend is freaking out saying that since I just got off of my period that I’m super fertile and I need to buy a emergency contraceptive pill. I asked how I was gonna do that since I had no money and no time nor anyone to take me. He ended up having to ask his older step brother and his girlfriend to buy me one. My bf was at a house party his parents were throwing and he had to stay. So his step brother pulls up and BOI IT WAS SO AWKWARD. I had no idea what to do. I thanked them but I didn’t know what else to do. Like “thanks for saving my future haha bye. Drive safe” AH but probably the last time (till I go on birth control) that I’ll fuck without a condom.