Birth control at 16?

Cande • Hello everyone!! :)
So I've been in a realtionship for about an year with my boyfriend which is 18. I'm 16 and we haven't had sex yet. He tells me that he doesn't wanna rush anything so he will wait and I'm okay with that. Last week my mom told me she wanted me to get into birth control. I told her I'm not having sex but she insists because she believes that I will have sex with my boyfriend in the near future. One of the reasons I'm against getting into birth control right now its because I'm really regular and I love being regular but I'm afraid the pill will chage that and make me irregular. Opinions?