Is it normal for a 12 year old girl to masturbate?

So ok, this is kinda awkward but it’s been bothering me for a while and I feel like it might be affecting my life because I just can’t make a decision that I think is right. Well ok, so when I was twelve in the summer, when I had just really learned about sex, I kinda discovered how to masturbate. I felt kinda bad about it but it felt really good so I kept doing it throughout the summer and when school started again. I even went on a porn stage but I knew it was wrong so I stopped soon. So then like at school some perverted guys were talking and they started asking girls at my table if they ever touched themselves and they all were ewwing and said of course not, so then I started to think I was a pervert or like a freak and I felt really weird and awkward at school and at home. So then I turned 13 a week ago and I promised myself that I would never do something like that again but I really want to do it again cuz it felt really good but im confused now. I come from a really strict family, youngest of three girls, and I feel like an outcast and like im doing something wrong. So I was just wondering, am I normal? Will I hurt myself? Will this affect my relationships later on? Is it okay for me to do it again?? I just don’t want to make a bad decision but I still want to get over it…