I have had reoccuring sleep paralysis for the last 3+ years, and it used to scare me like crazy. It was always worse when I struggled against it though, and now I know that if I just ride it out and don't get scared, then nothing scary will happen (most of the time). However I read some helpful advice on this forum which has helped me get out of SP. What I do is hold my breath, which signals to my body to wake up. I have only done it once, but it worked like a charm and I suggest you try it next time!