To dream of receiving a vasectomy is a sign that you may be feeling a need to get back to your roots. There is an indication of 'tribe' here and a suggestion that connecting to the earth through 'drumming' or 'gardening', etc. may be helpful at this time.
To dream of fearing a vasectomy may be an indication that you are uncertain about an important decision and need to rethink it. Note the connections in your waking life. For example, if you or your partner is about to undergo a vasectomy and there are dreams of fear surrounding it, then this may be cause to discuss the matter before proceeding.