Thanks everyone. Especially Madmeg, who I send good wishes to.
I have been through cancer treatment myself, so I understand all the anxiety etc.
Have visited dentist today and was calmed down!
I am having the the two fron teeth extracted and immediate denture. It will take 4 weeks, so just have to hope for the best with my holiday, which is only a few days and fortunately in the UK.
Dentist says the abscess is very small but could erupt very quickly and advised a visit to an emergency dentist for antibiotics if it comes to the worst! Not ideal but I would lose £400 if I don't go. I'll judge the risk the day before I leave.
My dentist is private, so it's costing an arm and a leg anyway!!