Anxiety effecting my schooling

I’m 15 and I’ve been outta school for months now because of my anxiety I never leave my room I hate going out every time I have to I feel sick I feel like I’m going to faint it’s just awful but the worst part is that I’ve drifted from all my friends the only people I really have are my mum and boyfriend but having anxiety is effecting my schooling so bad I’m suppose to be having my GCSE soon and I honestly don’t think I’m gonna be ready to go in for them but I’ve always wanted to pass them I just don’t no what to do because if I don’t do my GCSE then I’m gonna find it hard to get a job!