Insomnia but somehow not tired..?

Yesterday marked my first day of my current streak and last night I only slept about two hours or so. I tried desperately to get back to sleep for hours but could not manage it, and decided to stay up even though I felt rather tired. After I ate some food however I’m all of a sudden feeling as though I slept maybe six or seven hours last night and seem to have a sense of unexplained excitement and increased energy. I’ve been exercising daily for the past month while trying to get back on a streak, eating healthy and for the past two nights I’ve had cold showers. This is the first time I’ve seemingly experienced insomnia as a withdrawal symptom and I can’t explain the fact that I don’t even feel that tired or sleepy. Has anyone else experienced this?

 

That describes this feeling perfectly. Mentally I’ve been more alert, but physically I don’t feel that tired. It’s very strange. I hope this won’t last too long...