Social Anxiety At School?

Hi! So basically based on the title you know I have social anxiety, I go outside often but not as often if that makes sense. Last year really sucked at school, my anxiety made me not wanna go because I'm scared of having anxiety and I can't get through the day , I just don't want to get through it. I got classified as a school refuser and got signed up with PINS, but that case closed since its summer , school is starting next week and I don't want it to be repeat of last year. Please help! I'm also on 100mg of Zoloft, I've been on it for only A week , I've been increasing my dosage but I don't see a difference. Please right anything that'll help me get through the day please!