As for anxiety I feel I suffered from anxiety when I was an adolescent or young adult but as I grew older I became more calm and more resilient to stress.
As for mood swings I dont experience that so I can't understand you, but I advice you to try to chill out and relax. Things are not always it first appears to be. Even if things seem bad at the moment , a moment later you will feel better regardless, if you just forget about it.
Just chill out and don't take too much notice and over time you will have good days and bad days but you won't die.
Just relax. I don't think you suffer from hallucinations, it's just mainly other stuff you've mentioned.