Thanks to all of you for your responses to my post last week. The good news is, he seems to be fine now. He has not had any of the "rebound-like" major episodes since last week. Thank goodness!!
I guess that I will just chalk it up to a combo of weather, growth spurt going on, and mom not feeling the best and acting different all at the same time.
We are keeping an eye on how he is doing at school and at home, because there has been a day here and there where he is "off" at school. Very sporadic at this point, but we are watching to see if it continues or begins to happen more often.