Yorky, take a deep breath.
You certainly are borrowing sorrow from tomorrow !
Please try and stop watching, taking photos of you mouth, googling, to try and fathom out what is going on in your mouth.
You need a specialist and a biopsy to confirm anything. At the moment you are jumping to conclusions and terrifying yourself. There may well be nothing sinister going on at all. What a shame that you have not been able to enjoy your holiday with your wife.
If I was you, I would go and see your GP when you return to the UK. Tell him/her about all this worry and the stress you are under. Maybe they can get your appointment moved up and also give you some anxiolytic type medications.
I wish you all the best with this and I sincerely hope this turns out to be nothing. Then you will have borrowed all this sorrow from tomorrow for nothing.
Please keep us updated,
Tammy

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!