R.K.
This sounds exactly like my son. Evan just turned 2 and has been the same way. He got a little better after we found out he had some food allergies 2 of them didn't present w/ the typical hives he was getting what seemed to be cold after cold and eczema was flaring up real bad and it turned out to be a dairy allergy. Is he only waking once? If so that's not so bad some kids don't sleep all night until 3 or 4 so for now just tend to him if he is crying he must need you for something. Maybe he is having some type of discomfort, gassy, teething I know my son was terrible w/ his canine teeth and his molars, bad dreams, who knows it won't last forever. Good luck.