So I have severe medical anxiety, it's a big problem in my life. I've already had confirmed covid once a few months ago. I'm "technically" a Healthcare worker, at a residential treatment home with  older people. I've finally worked up the courage to book my first vaccine appointment for this friday; I decided to get over myself to protect those around me, and I'd like to be less worried about catching it again. Well, I just got off the phone with my grandma, who over the past few years has turned into a completely different person, all aboard the Trump Qanon crazy train. She literally YELLED at me not to get the vaccine, telling me that I will die if I get it. The links she sent me were from weird conservative websites that all said the vaccine is a population control device and everyone who took it would be dead in 5 years.
Logically, I know this is fear mongering political bullshit. But mental illness isn't very rational, is it? I'm freaking out now, worried about all the "what ifs" and the unknowns, and afraid at the fact that one of my few closest family members, who knows about my extreme anxiety,  literally told me I would die. 
Anyone have any words of wisdom to help my anxious broken brain get through this and make a decision?