Venting.. Help..possibly preg.

I cry as I write this. I made a mistake. I'm in a long distances but he's coming in two weeks. I had sex 3 days ago. I think he came inside me because I've had discharges and searched up, it may be cum. also I just started my fertile days today. I love my boyfriend so much, it hurts me enough so please no rude comments..I've never done this to a person before. I'm young, kinda late teens. but in too young. I know, why did I have sex if I'm not ready for a baby? I understand. I have nobody. I need to leave my boyfriend, he's the best I ever had. he's family has been the best to me and I finally get to see him again, but guess not. I plan on leaving him, because I don't want to drag him into all this drama. the point is, I prayed and prayed, begged, asked for forgiveness, to God, and I feel like it's too late. I messed up so much I feel like I can't change anything back. I have to deal with the consequences now. you guys don't understand how I feel. we've been together for suchhhhh a long time and been through so much. we've had God together in our life's, but temptation killed me. I regret it. I pray I'm not pregnant. I need someone to talk to. I need help. and the guy I did it with, no one can know. he's so close to all of us. it sucks..but I have hope. I'm shattered, but I have hope. I plan on taking Plan B, but I don't know if it'll work. but I promise, pregnant or not, I am not having sex, till marriage. Please..pray for me.