Well if he is teething and he is uncomfortable then it is really tricky to ST. If you feel he is uncomfortable or I pain and you need to cuddle him for this I understand. Having said that, at this age we often found going in to DD would make her more frustrated that not going in, so after taking advice from others here we often just reassure from the doorway with our voices, or do a sort of walk in (sort out whatever needs doing fairly quickly and quietly) walk out and reassure from the door. Do you think this could help you in the mornings? Do you have a sleepy phrase? Something like "it's still nighttime sweetie, sleep tight, mummy's here" can be very reassuring.
But it is your choice of course, if you feel he needs you then go with it and we can sort the morning problem when he doesn't have teeth on the move.