Dying to sleep

So any mom out there definitely knows what I'm talking about. You finally get to the point where your kids sleep through the night consistently, then SURPRISE!! They decide they don't like sleeping anymore. We were on a good roll. Ethan had been sleeping through the night a good 9-11 hours for about a month. Then he had to go ahead and get some new skills (up on hands and knees and rocking like crazy). He wakes up about every 2 hrs now. Whenever I go in his room he is rocking, and he's got this look on his face like "Hi mom! Look at me!". He's just so darn cute, but it's driving me crazy. He did this for 3 weeks, then slept through the night 2 nights in a row - I hoped we were back on track.......no such luck. He's back to being up every 2 hrs. I'm mentally at the point where I'm ready to just let him fuss/cry it out, but the poor guy has a major cold and can barely breathe now, so that's not going to happen......

.....I tried napping today while he napped, but of course I laid in bed for an hour without falling asleep. As soon as I started dosing off what do you know? the boy has awakened yet again. He's sleeping now but of course I'm too tired to sleep.