I have always had sleeping issues & waking issues up until a few years ago. Has been going on since I was young. It was much worse after exercising. Problem was that my body was getting too relaxed to the point where my breathing stops. I would wake up unconsciously 30+ times per hour to catch my breath. Now I depend on a CPAP machine to help me get a good night's sleep.
Your symptoms sound like mine; talk to your doctor about it. He/she may ask you to get a sleep study done to determine what is going on.