hey, im only 17 and i have had sleep paralysis throughout my life,more often when i was younger. and i got it not so long ago. may i suggest that marijunana,DOES NOT help. i am now paranoid from it in everyday life. its gotten alot better now though ive moved on form it but there are still times where i dont feel safe and start to panic when i nknow its ridiculous because i was just in HMV and started getting a bit flustered for no reason.
in my sleep paralysis, i was laying on my back with my right knee up. i started to hear white noise and a slight muttering of voices, i then saw this strange creature looking thing sitting on my stomach. it was just a face. allmost asif a devil sort of face. it was terrifying. ive never been so scared in my life because my eyes were open.i was awake and i was seing all of this for real as though my eyes were projecting it. i tryd shouting for my mum but my mouth just heated up realy bad. then a few minute slater ( i assume ) i snapped out of it.
recently i have now been feeling pain in my sleep, my teeth were falling out and it felt like someone was just ripping them right.
i have dont have alot of stress anymore but very bad things have happend in my childhood and i am currently still concerned about my familys well being due to a couple of things whitch have happend recently.
in my eyes there is something MUCH much deeper too this, supressed anger/memories thinking about my past and understanding it a bit more did help. and meditation...i know it sounds extreme but meditation helped ALOT for me aspecialy with chi (yin&yan).
http://en.wikipedia.org/wiki/Sleep_paralys
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thats what wiki has to say about it...something about REM (rappid eye movement) take a look for your self, you might find it somewhat interesting. the picture most definatly intrigued me,as of the hole "devil type thing sitting on my stomach" id love to talk to other people about this to get a bit more of an understanding about it because it is very strange and well...im not alone

... unfortunately.
and also to the last comment...i also had epileptic fits when i was a baby,and i woke up from having one in my sleep not so long ago either...i dont know if is to do with that or just coincidental but,weho knows
i hope that was of some help.
take care people