Period ? Implantation bleeding? Idk plz help me


So I be having really weird felling like I wanna vomit but I don’t then I’m bleeding but the 2 days were heavy and then it was light this never happen to me I awalys have regular periods I never had sex tho I’m only 14 I’m scared if it implantation bleeding cause idk what will I do if I’m pregnant cause I think to my self like I masturbated sometimes and I have bf we never do sex like I don’t know what to do