I Suffer From Vasovegal Syncope, Am 46 Years Of Age

I suffer from Vasovegal Syncope, am 46 years of age and diagnosed with Hashimotos 2 years ago. I have suffered from Vasovegal for over 20 years, when watching someone insert needles into someone or me, to draw blood, and I am wondering if there is anything I can do to get past this because I want to go back to school and become a Nurse. Please help.