Irregular periods

I’m 15 and my periods are more irregular than what is considered okay, once I was 7 months late on my period and before my most recent period I was 3/4 months late🤷🏻‍♀️ on a regular- daily basis I experience vaginal discharge but it’s not smelly nor is it itchy, I’m just scared that it is something to do with major infertility, that maybe when I’m older I won’t be able to have kids, I’m so confused I’m scared please tell me is this normal? Can i be sorted? I need answers!!