What happened??

[Dark Ruler]

I've been trying to astral project for a while now, but im still unsuccessful
but afew nights ago I tried meditating and all that... When i came to trying to exit my body, I felt like I was being crushed or being pushed from all sides and I found it difficult to breath.  
Can anyone tell me wat this means or what happened? plz?

[CaCoDeMoN]

I think that these are just symptoms of deep trance.

[Dark Ruler]

I thought deep trances where hard to get into unless your VERY good at meditation