How do you deal with the anxiety?

does anyone get anxiety with testing for other medical issues? I'm having a problem I will need to go get checked out, and is probably nothing but I can't bring my self to make the appointment because I'm terrified of testing and exams and the waiting.

I had pneumonia earlier this year and I had to get an X-ray and then a CT of my lungs to rule out a side effect from my chemo. Just sitting there waiting for the doctor while looking at my imaging started making me panic and felt like forever.

I don't know if that makes any sense or what I can even do to cope. I just can't seem to shake the anxiety over this.