Tooth Remineralization. What are my options for repairing enamel? (Photo)

I tried tray whitening from my dentist, I was given 35% carbamide gel to use 30min a day for two weeks. Unfortunately I fell asleep with them in both times I tried to use it. The first time was 4 hours, second time was 2 hours and I even set an alarm! I feel like such an idiot. My teeth are really sensitive, white, but seem to appear translucent? I think I might’ve caused damage. What are my options for repairing enamel? Could the appearance and sensitivity be permanent?