I have a feeling I might only hear crickets in response to this one..it's kinda weird, but here goes... I often wake up around 4 or 5 in the morning for a toilet break, feeling fine. But then the crash will set in by the time I wake around 7:30. What the heck happens between 4 AM and 7 AM that makes me crash? It makes no sense! Has anybody else noticed anything like this?