Still, so still.

So today, I had the alarm go off around 5:30 am or around that time. I was tired, I didn't want to stay up an hour and go back to sleep, so I just hit the off button and escape into sleep. I woke up multiple times, once at 8:00 am then I went back to sleep at woke up at 12:30 AM, now it was awesome, because I just got done (in my dream) playing hockey, and I just saved a goal, or something happened, and I woke up, I realized I was awake and quickly remembered not to move. I layed still, and within minutes my legs started moving (no clue why) and my head slowly tilted upward, but after a while (I was laying on my side) I got kinda irritated, my back started to hurt, and I was laying on my arm and I thought my circulation was gonna be cut, so I moved quickly to my back, then I had to get up within a couple of minutes, no luck, anyone got any tips?

Does this happen a lot?