Some of that would be classed as social anxiety, so you weren’t wrong lola212121 
You could take a CBT approach with each worry, so for example with the holiday and not wanting to eat vegetables, was she worried about saying she wanted something different? What were her thoughts? Did she think people would think her strange? Be annoyed with her? Then get her to look at the evidence for each though, and how much she believes it as a percentage. Then look at other thoughts she could replace it with.
She needs to retrain her brain to sort of argue against the worrying thoughts. Easier said than done!
Also, she could try mindfulness as that bring the focus into the here and now rather than the future. This is a good skill to use daily and when feeling anxious, but I’d also try the CBT approach.
Also, do some graduated exposure. For example she doesn’t like phone calls. Get her to phone someone where the pressure is allow, or where it’ll be a quick call. Do this many times until she feels more comfortable with it, then step it up a level.
She could also try EFT, Emotional Freedom Technique - have a look online for how to do it and watch some videos.
Medication is also an option, depending on how bad she feels and how much it’s affecting her.
Do you know what’s triggered it or is it something that’s come on gradually?