Hello. I'm 18 Years Old And I Had My First

Hello.
I'm 18 years old and i had my first sex on Thursday night and i lost my virginity. It hurts alot... For the first hours i didnt bleed that much but spotted. Second day i had bad cramps and backache really bad with heavy bleeding. Today is third day and i have backache and cramps as yesterday. I want to know is it normal? Is it my period? Becuz my last period finished on 14th march and today is 10 april... Help me please. Thank you