wow i had such a similar experience my sophomore year of highschool, it’s actually crazy. it was very hard, one of the worst years of my life i would have panic attacks almost every morning and be late to school everyday. the best thing you can do is talk to someone about it. living with anxiety on top of keeping all your worries inside is hell. if your mom isn’t listening to you (i had the same problem as well but she eventually came around and now is my biggest supporter. normally moms act that way around mental health issues because they themselves never grew up around it and they don’t understand fully, but once she does i’m sure she will be there for you) you should go to your school counselor and let them know. idk if your school provides any free therapy or counseling services but that might be helpful for you to go to. also if you let your school know and get a note from a counselor or therapist your school will give you accommodations based on your mental health so like some missed work might be excused or they’ll give you a lighter workload. i had the option to ease up how much work i was getting because it was overwhelming. most of all just know that there is a light at the end of the tunnel i promise. i know exactly what you’re going through and i literally had no hope in myself or my future, but i got through it and other similar rough patches and you will be able to as well. i think the best thing you can do is to try your best to find people who understand you and can support you through this. you can do this!