I've missed my period by 3-4 months now, I'm 15, i've spoken to my mum about it she said it was down to the stress of my dad passing away and school and helping organising the funeral and all of that, but now i'm not so sure. Surely the stress would have gone by now and I would be one, I'm still a virgin i can't bring myself to have sex because i'm really scared

So i know i'm not pregnant, but i am worried... i haven't had time to go to the doctors so i thought i'd check on here first, if anyones had the same problem, so i'm don't go to the doctors and waste their time.. PLEASE HELP!!! It would mean so much.