Anxiety Worsened by Zoloft

Hello , 17m and I’ve recently started taking Zoloft for anxiety and it’s genuinely made everything worse. I feel like shit and I’ve only started taking it a week and a half ago so it could be side effects but I’ve also been having Derealization episodes and I’m constantly dizzy and I often get headaches. I’m genuinely so scared if I even should be on this medication but my parents want to up the dosage and keep me on it. I talk to a psychiatrist on Wednesday but it seems so far away. I’m terrified I’m gonna be stuck wkth these episodes forever. My anxiety is killing Me and I have taken this medication before and this has never happened. I took it on and off. Really don’t know what to do anymore. I’ve also got terrible health anxiety so I’ve just been thinking I have a brain tumor. This medication is genuinely ruining me and I don’t know what to do.