5th time using plan b

I've used plan b way toooo many times I think please don't say rude shit because I've only used it 2/5 times for unprotected sex and the other times I used a condom but it popped I can't get on birth control yet I'm 17 and I heard the maximum times you should use it is no more then 3 times a year 😳 now I'm scared so what is going to happen to my body (btw I'm not having sex again till I'm 18 it's too risky)