Sleep regression

Has anyone gotten through the sleep regression associated with their baby's newfound mobility? My 8mo old has been an amazing sleeper (not even a 4mo sleep regression) until this past weekend. He's close to crawling and it seems like it's all he wants to do. He goes to bed around 7-7:30 and he's fine until 1-2am, when he starts babbling, rolling, and getting on all fours. He then falls asleep again on his own. But then 2 hours later, he wakes up crying. I don't think he's teething (although he has no teeth) because he's happy as soon as we pick him up. We've resorted to feeding (formula) and rocking him for the past 3 nights, but I'm afraid to start that habit again. I'm not against sleep training, I've just been lucky enough not to need it until now. Anyone have any advice?