Thank you for letting me know what it was you were worried and annoyed about @outlander, I can understand it being both (your Sister being in your car a lot, where you are keeping your personal things). Does your car have a 'boot' that you can lock those things into, or does the glove box lock? Perhaps you could look into a lockable box, I do think it's important to have somewhere to keep your private papers and things. If you were able to get a lock box (maybe even a lockable suitcase from a second hand store?) that was portable, you might be able to keep your things in your room with you.
I've had panic attacks just about everywhere I think outlander. I definitely notice it in my breathing, it becomes very short and shallow and there feels like a band pulling tight around my chest, it's very uncomfortable, I get very dizzy. I suffered a lot of nausea for a long time, had myself convinced it was stomach cancer or something - but I wouldn't be here now if that was the case. I also worry whether the things I see and hear are actually real, and it seems to make my panic worse - though I probably look like I'm calm, almost vacant of emotion . . . it's like I freeze. So I think I understand a little.
It's different when I'm around people. I just can't think, if I have to answer a question or something, I hear this childlike voice, but it's coming from me. Then the crying and shaking begins and it makes me angry with myself, but there's nothing I can do about it, except cry and shake even more. I've been ripped off many times, because if I'm not pushed to the point where I'm crying and shaking, I just smile like a Cheshire cat - no information really goes in and I think some people clue onto that rather quickly. I think those people assume that I'm stupid and take advantage of the fact.
Your reactions are a very individual thing, although they tend to group people with similar problems into brackets, it doesn't make you any less you. You've mentioned health anxiety, that's one I haven't had thrown at me. Though my Grandmother, Mother and Brother all passed away whilst suffering cancers. I don't know whether anxiety is really my problem, it's more an inability to trust, an inability to believe anything positive in my life and a constant suspicion that someone or something is 'out to get me'.
But I know I'm a lot better now, I have gained a lot more calm in my life in the past decade or so. I've realized it was worth the battles for a sleep pattern, remembering to eat and to choose healthy foods, and the biggest battle for me was the battle of the booze - my life is so much better for all those battles.
Keep battling outlander, it really is worth it, there is a light at the end of the tunnel. Your efforts will be rewarded