Possibilities

Yesterday me and my boyfriend has sex 3 times. The first time we had sex with a condom, the second time he came on my tummy, and the third time he came on my vagina. I was riding him backwards and he came right outside my vagina. I'm pretty scared to get pregnant since I'm not ready. I don't have money to get plan B since my paycheck doesn't come for another week. What do I do ? Any home remedies I can do?