My son is 23 months old and in the past month, he has become increasingly grouchy! I don't know what to do. His molars came in two wks ago, so I thought maybe that was the cause. However, that's over now and he is still grumpy and extremely whiny. He wakes up from his nap and sometimes seems crabbier than ever, which doesn't make any sense to me. Nothing has really changed, except maybe he misses some of the excitement from the holidays? So, is this just the terrible 2's or is something else going on? He's normally such a happy-go-lucky kid, this has been such an 180. He signs a lot and talks some too, and when I try to ask him what is wrong, he doesn't want to tell me most of the time and just ends up throwing a tantrum. He only naps about 1-1.5 hrs once a day now, but it seems like he's tired all of the time. I do not know what is going on, we have moved his bedtime up, thinking it might help (now it's about 7:15pm), but it mostly seems like he's crabbiest in the afternoons. In the morning he is usually ok, until it gets close to his naptime, you can tell he is tired. Has anyone else gone through this? How long did this last and do you have any other tips or suggestions?