As @mikaylar and @loribmt mentioned, why not find out what your doctor is noticing? The ball is in your court how far you want to pursue what has been noticed. Perhaps you have other medical issues being addressed, and together everything can be overwhelming. I certainly "get it". And sometimes the thought of something new or unknown is pretty danged scary, I get that, also!

Take a few minutes to sit with some paper and pen, write out what your fears are, why you feel hesitant to pursue an answer. Deep breaths, and then just release them. I'm pretty sure your doctor is not making the suggestion "right away", are they? You do owe it to yourself to be informed. Let me know what you think of this, please. And lastly, welcome to Mayo Clinic Connect. I am glad you wrote in, and bet others can really relate to your question!
Ginger