So last night....
He went to bed around 8pm with no problem, and slept until around 12:30am (this is already an improvement). I fed him, and after that I think he woke up at least 2 or 3 more times (I'm so out of it in the middle of the night, I'm never really quite sure).
So, he didn't sleep well, BUT.....
He had a pretty significant fever - I think probably from the 2 shots he got earlier that day. He felt like a little oven. So I don't even know if I can "count" last night with the fever.
His fever is gone now, but I noticed that today his appetite is less than what it would normally be. I gave him some wheat cereal with some prunes and peaches, but he might have only eaten a couple of teaspoons. He's napping right now (was very tired). We'll see how the rest of the day goes...