I'm not sure as to why you've undergone a gruelling session, just for the final fitting ..... although I suppose it depends on how you are in a dentist chair.
I'm fine and can undergo a root canal no problem; whereas my missus says she can feel herself gagging, even when she's only having a routine examination.
You and your dentist are probably the best 2 people qualified to answer your question ..... have a word with your dentist and see what he says.
Just out of curiosity, what happened that caused your session to be so "gruelling".
.... not long now ..... good luck ..... I'll be watching this space :)