Is it Astral Catalepsy, a sleep disorder, or something else?

I really need an answer, because its gradually getting worse. It started sometime around the middle of my school year in 8th grade (2005-2006). I cant remember the first time it happened, but when it would happen, i would awake and it would be extremely difficult to move, it i tried then maybe i would only get my fingers or toes to twitch, and it would be difficult to breathe. when it happened i would try as hard as i could to move until i would snap out of it, it usually only lasted about 45 seconds to a minute. i would gasp for air, but i wasnt frightened, i was usually to sleepy, so i went back to sleep, then upon waking, it would be likely to happen again. for the next year it would happen occasionally, there would be periods of time that it would happen and wouldnt happen. lke there would go a few weeks of it not happening at all, then there would be a week, and it would happen most days that week, it was like a cycle for a year, until something differant started happening. It was a year later and i was a freshmen in high school, 14 years old. it was in the begining of the year 2007, it happened in a severe way. this time it was nighttime and i was "going" to sleep, as i was falling asleep it happened, the very moment i fell asleep, i woke up with this intense pressure in my head, it felt like my brain was being squeezed and my head would either implode or exploe, and i could feel it in my ears too, parts of my body started shaking uncontrollably and i had this weird feeling all throughout my body, like a vibration, not very intense, but very obvious it was there. and the other symptoms were there too, (the not being able to move and hard to breathe) it lasted maybe a minute, then i snapped out of it. I had to get used to it though because thats how the episodes were from then on, except without the uncontrollable shaking, that never happened again, just the pressure in my head, the vibrations in my body and the not being able to move and difficult to breathe.. until now , its been happening like that, and its more than two years later. there would also be periods of time where it would haplpen alot throughout one week then it would subside for maybe a month, but everytime it subsided and came back, it would only come back more intense, everytime the pressure in my head would increase, until now its soo bad, but now i have a little more ability to move, like i'll be able to move my legs, only below my knees though, and i can also make sounds. my lips and tongue are paralyzed, but my vocal cords still work, so i can make sounds that sound like moans or grunts, sometimes i try to call out my brothers name, but only grunting or moans come out. sometimes i can turn my body, like fomr lying on my back to lying on my side, or stomach, but that is incredibily difficult. my friend told me a long time ago that when that happens to you, it means that supposedly an invisible dead body is lying on top of you and thats why you cant move. i didnt believe that until last night though. as i was falling asleep yesterday, i could feel it coming on several times, i fought off the episode, but i was so tired that i gave in and an episode happened. the usual physical symptoms happened, but this time i moved my head forward, but only once, this time i could move anything below my neck, i snapped out of it though, then once more that night, it happened, it started when my eyes were closed, i could feel the pressure in my head, and the vibrations, throughout my body, but suddenly if felt as though from my chest and up all the way up to my head there was an invisible force acting upon me, i could only open my eyes once for like a second, then they closed. i was able to move my feet and legs though, (only below the knee) i crossed my feet and i was grunting and struggling to make out a sound that sounded like help, but it sounded muffled like someone was covering my mouth. i didnt sleep there anymore that night. it was weird because it felt like someone was actually sitting on my chest and head. i could feel the force. and from the hundreds of episodes in the past 3 and a half years, 95 percent of them happen in my room on my bed.