Couldn't sleep

I woke up at 3:00 this morning. I couldn't sleep. I think I got messed up from going to the gym so late at night. Maybe if I had soaked in a hot tub afterwards, I would have been better, but because I got my heart going at night, I just had more energy and it messed me up. I feel asleep about 11:00, woke up at 3:00, which means I only slept 4 hours. Those were not peaceful hours either. I was tossing and turning most of the night, so I probably only slept about 2 hours. I have a headache now.