I can’t stop crying.

My boyfriend is a year and a few months older than me. I am 15. I asked to go on birth control my mom said no but I had to give her a legitimate reason why I wanted to. She didn’t know I was sexually active and I told her and she was so disappointed in me and she wants me to tell my dad. When my mom was 17 my grandmother found out that my mom was pregnant and wouldn’t let her see that boy ever again and I am very scared that will happen to me. She said losing my virginity at 15 was very bad and early. I am so scared for when my dad talks to me. I know he won’t take it lightly. I can’t stop crying every night and day and constantly wishing that I never said anything. I don’t know what to do or feel. Was I too young? I said I felt ready but she it was disgusting. Then again my mom and dad lost their virginities at 17. I feel like a shitty daughter. I just wanna run away and cry.