Hi D.,
There is a cold virus going around. My sitter came to work sick and gave it to my 10 1/2 month old G/G twins. Very irresponsible, when I told her not to come to work if she is sick. Anyway, I am giving my twins Tylenol as well and it seems to help. But one of them woke at 1 AM last night and at 5:45 AM w/ a fever and felt crummy. After the Tylenol, and a little milk, she just wanted to be held. Try just holding your baby before putting him down to sleep until he is drowsy. She fell asleep in my hubby's arms and then we put her back in her crib. This is unusual b/c she sleeps regularly 12-13 hrs straight too.
Your baby's molars might be cutting through the gums? You can try Baby Orajel OTC at CVS drugstore. Most stores carry it. It worked great when my girls had pain w/ teething.
The other problem could be reflux and/or gas. Do you have a swing that you can put him in which elevates his head for sleeping? Then once he falls into a deep sleep, transfer him to his crib. There is also OTC anti-gas drops you can try too at CVS. I would first check w/ your Pediatrician though since the fever has been going on and off x 3 days.
Hope he feels better!
E.