Help mee

I've just gotten a new haircut and it was completely butchered, like it's not even remotely close and I can't even begin to fix it because the original haircut that i wanted was super short but she somehow managed to make it even shorter, I don't know what to do, I have exams and stuff but I cant even stand the thought of going out no matter how hard I try, even with my family's encouragements I can't bring myself to take a step outside, it's impossible
I've also thought about just covering my hair but that's against school policy/dress code so I'll be asked to take it off either way, even if I wanted to wear a wig or something not only will people know but there's also practically 0 places to buy good quality wigs (we don't/can't make online transactions here) what do I do?