You should go to your doctor or a gyno to get peace of mind. You can get skin cancer anywhere, even if it is an area that is never exposed to the sun.
Having the gyno just look at that area is not going to hurt in any way. You just have to get over being embarrassed.
I remember my first visit to the gyno. I was 12 and had an awful yeast infection. He did a pelvic exam and everything. To me the worst part was the exam table faced the window. The doctor's office was in this huge high rise building on the 7th floor. I could see people working in the building across the street. There was no blinds or curtains on the room window. I could see these people sitting at their desks working. I was scared that if I could see them, then they could see me with my legs spread open. And the doctor was male adding to the stressful situation.
So, go to the doctor, and try to get a female doctor with an office that has curtains. Then you will be less embarrassed.
Good luck and let us know how it goes.