I am completely there with you. Last 2 days Oscar has woken up fine and then gone crazy crying.
Tuesday he went nuts in the morning just crying and crying and trying to shove both fists in his mouth. Until then I didn't know if it was teeth or not, he didn't have a temp and I checked him over and he physically seemed fine, then he did the fist thing and pulling his ear so gave him calpol and put him in the pram and pushed him around for dear life lol, he finally calmed down and managed a 20 minute nap.
Then yesterday thought he was ok til the afternoon and then the same thing, this time though he was crying for almost 1.5 hours, calpol did nothing, teething gel nothing in the end he just seemed to sleep through exhaustion then woke up after an hour screaming again. I was so drained and just hate not being able to help him.
So far today he's ok but I'm on alert, just wish at least 1 tooth would cut through. He's got all the top front and now it seems bottom two front ready and waiting but nothing as yet.
You are not alone on the sleep thing, Oz wakes throughout the night, we co-sleep so it doesn't help that he wants milk from me in the night, but I think it's the teething that actually wakes him to start with.
Come oooooooooon teeth lol