Dealing with Ableism and Bullying in School

I had finally gotten adjusted to having a daily routine of going to school after struggling with not only chronic health issues but also pretty bad panic disorder w/agoraphobia. I'm emetophobic so my panic attacks/agoraphobia have only been exacerbated by the fact that I'm constantly nauseous, and all the anxiety makes my health problems worse too. I was planning on taking good care of myself over summer vacation but somehow despite my best efforts my health got much worse and I am incredibly nauseous every morning again. school starts again in a couple days and I don't really know what to do to manage my horrible anxiety about the whole situation or what to do to feel less sick while I navigate having to travel across town on public transportation super early in the morning with all of my symptoms. I'm pretty terrified as this is my senior year of hs and I'll have to put in more work than ever into college apps, grades, testing, etc. my health was really detrimental to my quality of life and academic performance last year and I'm afraid this year will be even worse. any advice would be great, especially if you are someone with chronic stomach issues or especially panic disorder w/agoraphobia. thanks!

Vent sorta. Whenever someone raises their voice at me or yells at me it makes me start to break down and loose trust in that person for awhile. And also when someone puts their hand by my face or moves their hand closely by me I make a screaming kind of noise, flinch really badly, then get into a defense pose. People will laugh at it and it makes me feel bad. I don’t know how to tell people not to do that kind of stuff because of the reasoning behind it.. how can I get them to know about my ptsd without telling them directly or if not telling them that then atleast letting them know what happens when they do that to me. Please help, thank you 🙏

My grandma just got really mad at my gpa bc he couldn’t get up from the chair fast enough to open the door for her (she couldn’t find the key to the front door and my gpa has bad knees making it hard for him to get up quickly or at a normal speed). She got in and they started arguing and my gma called him an asshole. I didn’t have an anxiety attack bc of this luckily, but it made me have a flashback. My abusive exs used to call me names like asshole, bitch, slut, whore, cunt, etc. It makes me feel terrible, but idk why it made me feel terrible when my grandma said it to my grandpa. They weren’t even talking to me. I just don’t know anymore.