3 months ago i started practicing astral projecting,and like must peoples i got these vibrations while trancing,or trying to leave the physical body.

after a week and a half i stoped practicing AP,but the vibrations didnt stoped.
i use to get them 3-4 times a day,now i get them 30-40times,each day and thats when i am not practicing EM.
when i am the number is allmust double.

so i wondered,can anyone give me more information about these vibrations.
couldnt find any on google.

what are these vibrations?
and are they controlable?if so through what practice?

Thanks.