Good Morning A., I would try very hard to stick to the routine you have started. Teething is sometimes harder on the Mommas more then the little ones. They cry we want to comfort. Bedtime Ora gel is good for teething.
His reg eating habits will return, sometimes with their little gums so sore they just aren't in the mood. Get a cold sweet apple and slice it, hold it in your hand and see if he will suck on it a little. The apple taste and the coldness of it might help sooth the gums some what.
As far as nursing to sleep, Well I wasn't fortunate enough to be able to nurse either of our son's. They were given their nap time bottle, burped, kissed and laid down. If they weren't wet or messy they were fine. Didn't hurt them one little bit to fuss for a while.
I do the same with the youngest gr son I keep daily. We do use and fan in the ceiling and music on a radio. He goes right to sleep. He will be one the 23 of this month. When he wakes up he usually lays there and talks or sings for a while before I get him up. Then he giggles when I get him. I did the same with his 3 1/2 y o brother.
So keep your routine, and stay calm Momma all will be ok.
God Bless you
K. Nana of 5