First Mammogram since the cancer.....

I'm sitting here waiting for my first mammo since all of this fun. I've had some procedures that they had to do for this and that. But sitting here is rough, and I just changed waiting rooms bc the gals were in there talking about their friend who just died from bc. Holy smokes I'm freaking out bad enough I can't sit and listen to that. Last might I had a panic attack,I was so disappointed with myself. This mammogram is on the left side ( cancer on right) and I thought it would be no big deal....WRONG....this is a huge deal. I am really freaking out, I can't do this again, I can't do chemo or anything again. I can't handle anything being wrong, what if it is, what will I do?