I might be pregnant?

Hey I’m 15 and I don’t want to explain what happened to me because it was embarrassing and upsetting. I am on birth control for my period because I had it really bad and I’ve been on it since November 5th. A couple of weeks ago on June 21 & June 22, June 21 he pulled out when he started cumming and on June 22 I was pressured to do it with someone and they were wearing a condom and even pulled out a couple of minutes before they finished and that same day I went to the store and got a plan b just and took it just in case. Now I was supposed to get my period on Tuesday and it still hasn’t came yet. I don’t know if I’m pregnant or not but I don’t have the money for a pregnancy test or for an abortion. I also have health issues and if I am pregnant idk if I can carry a child and have it without something happening to me. I don’t know what to do now and I’m just embarrassed that it all happened. What should I do?

Edit: thanks for everyone telling me that I was fine, I got my period today and I’m quite happy about that. When I was talking to my doctor when I was about to go on birth control she didn’t tell me anything about the side effects and the dos and don’ts of what to do while I am on it. If I didn’t make it clear then I had bought the plan b right after and spent all the rest of my money on it because I was super anxious about if I got pregnant or not. Also when I did have sex it wasn’t fully wanted but I felt like I was pressured to say yes. But I am fine now I just have bad paranoia and anxiety. Thank you for everyone who told me how birth control doesn’t work well with plan b😊