Phobia of father figures

I was raised by my grandmother and mom. I've never had a steady father figure in my life. My sister's dad was in my life only very briefly, he worked all the time and then was killed in a car accident when I was nine.

While I was never physically abused (though was emotionally) I was witness to a lot of it. I feel being born female was the only thing that saved me from the same fate. I watched my cousins and several of my friends be berated and hit or beat by their dads. It didn't even have to be for anything major. The slightest mishap was met with a scream and a sharp slap that sent them reeling.

Even now, I'm terrified of people's father figures. I rarely talk to them beyond being civil "hello, goodbye" if I can help it. I have to force myself to look them in the eyes while carrying on even pleasant conversation. I'm terrified of my own father-in-law after 5 years of knowing him in person. He's never once raised his voice or a hand to me or any of his three children but I feel like I'm walking on eggshells just being in his presence. It makes me feel terrible as well, expecting perfectly good, loving men to become raging demons at any given moment.

This phobia spread into my former occupation as well. I used to be a nursing aide at a dementia/Alzheimers facility and it was there I learned I truly do have a trigger. A male resident taller, bigger, and a good deal older than me got up in my face, pointing his thumb at me and hollering. My heart stopped. My throat clenched shut. My eyes dropped to the floor. I was terrified he was going to hurt me. I couldn't do anything. Thankfully, one of the other girls got him away from me and I ran straight to the nurse's station to try and calm down. Every day working after that was terrible. I actively avoided him and tried to switch people for other residents so I didn't have to care for him out of pure fear. Doing phlebotomy (blood drawing) in the hospital I work in now, I will not go into a room with a male patient that has a history of violence or aggression without a nurse present .

I know I have both Major Depression and Anxiety, but part of me wonders if I might also have some degree of PTSD due to the reactions I have had in these situations.