You sound like my friend, she had this problem. Same ages and everything o.O
Anyway, i don't think it' sanything to worry about, if you're really worried talk to your mum and book an appointment, otherwise wait a couple more years, because some people don't have their first period intill they're 16 or 17. So if you aren't too worried wait until then and then go.

Bu ttrust me, i haven't even had mine for a year and ih ate them. Stop complaining and enjoy the freedom while you can, when yuo start getting period pains and stuff you'll regret wanting them so badly!!