I’m having a panic attack

I didn’t know where else to go, I have major health anxiety and I can’t stop thinking about the upcoming eye-check appointment tomorrow (I have a medical condition with my eyes) I’m panicking so bad and no one around me takes me seriously or thinks it’s stupid to panic over.

To be more specific I have bad corneal scarring that affects my vision badly. For years I have been avoiding any eye appointments because I had bad previous memories from them which gave me PTSD. And living with health anxiety, it doesn’t help that my vision keeps getting worse and worse and I need new glasses so I don’t have a choice. I’m scared the doctors will find something or tell me something I don’t want to hear. My worst fear is going blind one day and everyone just laughs at me. If only they knew this is overtaking my life and I can’t rest.