Hi mary jane,
What you are describing is called Paresthesia, an abnormal sensation(s). These types of sensations can be felt anywhere and can be caused by many different things. You will need to work with your Doctors to try and figure out what is causing you to have these abnormal sensations.
You will find numerous causes for tingling/buzzing/vibrations in the genital area from this link:
http://www.rightdiagnosis.com/sympto...ing-vagina.htm
I have dealt with vibrations/buzzing in the genital area for 28 years (off and on). Mine is caused by a Neurological Disease.
I hope you find answers as to why you are experiencing Paresthesia and it is easily resolved.
Take care...