Strange feeling in my head

[sheraton2]

Hi my name is Steven im 22 and i live Scotland.

Ive been smoking marijuana for 7 years, but on sunday night i had a bad rush of thoughts in my head that freeked me out big time.
Ive never had that before.

The trouble is, is that my head still feels weird 4 days on, like theres an agrovation in it.

Ive posted in a few forums and they advised me to buy some black tourmaline and some sage to smoke over my self.
I done that today and have been wearing the tourmaline on my right side as advised.
I felt really positive about it after, and thought i was on the mend.
Then i went up to my mates house tonight, where they were all smoking weed (i was'nt), havent all week, and i started to get the same feeling in my head like i just wanted to get out.

I dont know whats wrong with me.
Im thinking it might be a negative entity feeding off me because i had trouble in the past with astral larvae in my sleep which is now stopped.

Anyone had any similar experiences?

Steven