Rubella!!!

Shereen

Hi ladies. I got the rubella vaccine in December and fell pregnant in feb i went for my prenatal checks and bloods cane back with rubella my gynae says it could be left overs from the vaccine but wants me to have an amniocentesis done at 16 weeks to be sure the baby is fine but im petrified of the amnio. Anyone had or heard of something similar happening and the baby being fine? Thanks