I have not read that anything like this should occur and I am not sure if this is the correct forum, but I found no where else this should be, correct me if I am wrong please.

I found an Astral Projection frequency .mp3 that says it could help you attain Astral Projection, I used this sound to help me attain lucidity for a dream, believing that the noises would help me maintain consciousness. I had lucid dreams 2 years ago, but never did again because I stopped trying to after that, and I finally tried again last night.

It was about 3am and I decided to attempt this, with that sound. I laid down on my back, and had my legs crossed, I was there for about 20 minutes when I felt my legs and arms get heavy, I was focusing on my breath to help myself maintain consciousness, which helped a lot, then my chest got heavy, and I assumed I was in Sleep Paralysis, and was close to attaining lucidity, because I had seen flashing lights while my eyes were closed. I continued to lie there, and my arms started hurting, and I was experiencing unfamiliar pain, that I have never experienced before.

I ended up lying there in 'sleep paralysis'... I believe, maybe it wasn't, but eventually after 3 hours of lying there, and ending up drooling on myself from drying to keep still, and not swallow (Wasn't sure if this affected anything.) I decided to change my position, it took me awhile, but I eventually shifted completely, and cleaned my face, and tried laying on my stomach, in hopes this wouldn't occur again. The entire night I would get into that 'sleep paralysis state' and stay like that for a very long time (3 more hours), finally the pain was so terrible that I decided to stand up completely and make sure everything was alright, and attempted to just go to sleep, but I could not, and lied there with my eyes closed, but completely awake until 9am...

I was wondering if this is a normal experience, or what, and why this had occured, or perhaps I was doing something wrong? I would appreciate any feedback. Thank you!