I think I'm pregnant

About a week ago, me and my boyfriend had oral sex. In the middle of it, though, he put his penis in my vagina for a brief time, and he made sure there was nothing on it. He went pee before we did anything. But I'm worried I might be pregnant, because I haven't had my period yet, and my body temperature has raised, and my breasts are tender rn. I'm really scared, because my parents will not approve, and I'm only 15. Can someone please help me?