Anxious about dentist but not the usual reason

I have a dentist appointment on Monday, and I’m very nervous about it, but not because of the actual appointment, but about what they might find or have me come back.

I’m worried I have cavities and I’ll have to take time out of my already extremely packed and stressful schedule to come back and get them filled which also makes me nervous.

I’m also worried I’ll have to get my wisdom teeth out, which makes me nervous because a common side effect is vomiting and I have a phobia of vomiting.

Everything online about tackling dental anxiety is about actual anxiety while I’m in the chair getting worked on, which isn’t my issue, so I don’t know what to do.