I can't even tell you how many times I've snapped at people for telling me "not to worry, it'll be fine". It's the most awful insult you can give to someone with anxiety in my opinion. To me it's like telling someone not breathe. I guess people on the outside can't understand though. I still snap at them anyway.
I'm really sorry you feel like no one understands you, it's a difficult place to be. I hope maybe I can help and try and understand you..you don't seem too complicated for me