About an hour ago I tried astral projection using a guide I found on this site, which can be found here: http://www.spellsofmagic.com/spells/spiritual_spells/conjuring_spells/3118/page.html
I'm concerned now, because since trying I've been experiencing a lot of twitching/spasming. I'm worried that I've somehow, I don't know, damaged my brain or something. I'm fairly new to everything magic-related. Can anyone tell me if they think this effect should pass soon, or if it is something to be really worried about?