It may have something to do with the fact that you closed all of your chakras. You only need to minimize the third eye and crown chakras..there is no need to totally close any of them.
You also may want to consider filtering, controlling what can come thru...versus shutting everything down completely.
You may have been experiencing something called "kundalini awakening", that I cannot recall personally experiencing (unless it was written off as neurological problems at the time) but people are discussing this particular phenomena in these forums.
Here is one thread that you may find you relate to. Little Freak Out Over Xmas Dinner
I hope you find the answers you seek.