u/Flimsy-Squash1599

I had my first derealization episode this week. Basically it's been going on and off for a week now and it started a few days before my period started and i have no idea what to do. I stay inside for most of my day because I'm a uni student and i have exams soon, but this week i haven't been able to focus on my studies and i even started smoking again to calm down my anxiety attacks. I need help figuring it out as i have no idea what to do and I'm starting to panic more and more often. I even started biting my skin in case maybe the pain could help but I've realised the pain doesn't even seem real. Does anyone have any tips on how to snap out of it?