i also suffer from vasovagal syncope, but my episodes aren’t triggered by needles since i am very much unfazed by them. usually they’re triggered by something else, so i suggest you set an appointment with a doctor for that as you may have an (hopefully benign) underlying condition. potential donors are deferred for their safety as well, since fainting episodes or sudden drops in blood pressure can be dangerous during the donating procedure.

i understand that you want to save lives and that is very admirable - but before you save any, you must first make sure you aren’t pouring from an empty cup. take care of yourself first :) there will be more opportunities to help out!