I went through this the past couple days. Not sure if this helps any, I've never been diagnosed or anything, but I'm fairly sure I had a manic episode and for a couple days at the end of it my thoughts were still flying all over and I was feeling energetic and anxious but starting to realize my body was tired and worn out at the same time. I don't want to make you worry anything but after two days feeling like that I slept for about 9 hours and woke up very depressed, how I feel now. Just a heads up to you that it could be you crashing.