Know for fact man had a vesectomy and had sex 3 & 4 days before period if i was pregnant would i of had my period and gould i worry about beig pregnan?

Vasectomy: The answer to your question is all based on the vasectomy have been in the past and not recently. A male who undergoes a vasectomy is advised to empty his prostate of any left over fluids and sperm and that this process of getting rid of sperm takes some time early after vasectomy. If he just had the surgery then may need to consider a home pregnancy test. But, it sounds like you shouldn't worry.