@Deanomyite , Your wife has some very important appointments she needs to make.
She needs to get a full pelvic exam, with pap, annually. The most important part of this exam is to check for cancer. Pelvic cancers are often silent, painless.
Another one, if she's over 35, she should be getting regular mammograms.
It is not a sin to have a doctor examine her. If she is a Christian, remind her that Luke was a physician.
Women's healfh is a field of practice, mostly populated with female clinicians. When I make appointments, I ask to only have women examine me. But I've also had male clinicians examine me, and at no time did it feel sexual at all, because it wasn't.
It is not a sin to care for God's creation. He says your body is your temple, and there are many, many verses about how when you have an infection, to show it to a professional. There are many medicines and balms mentioned in The Bible. God is also known as The Great Physician.
Please, either you go with her to the doctor, or have a female relative or friend accompany her.
The scan is very modest. The room is very dimly lit, so the tech can see everything on the screen, and make sure that she catches any abnormality. Your wife will be able to wear her shirt or dress. She will have a long, thick sheet covering her from abdomen to foot. The tech will only expose that part of the body that needs to be scanned (lower abdomen). She will be mostly looking at the screen, as she moves the probe on your wife's belly.
If there is an abnormality, the doctor may request an internal probe as well. This is very thin- like a tampon. The reason for the internal scan is if they need to be able to see the organs from the inside, to make sure she is healthy. The tech will ask your wife for consent. She will have your wife insert it herself, if she consents. The internal probe is thin and painless. Let's say they need to examine her left ovary, the tech will move the probe slightly to the left, to get a better image, but your wife will not feel much at all. Like I said, these illnesses are silent, and it's important to be checked.
It is modest, even with a male doctor. Doctors do not see you as sex objects. They are essentially, biologists. They make an oath to "Do no harm".
I would implore you to bring your wife in. You can talk to her regular doctor before hand, and tell them about the situation. The doctor can prescribe her a one-time anti anxiety drug, like lorazepam. She will be able to relax, and not have jitters. This drug can also help her sleep the night before, without being up with worry. It's not a good long term drug, but for times like these, it is excellent.
Please do all you can to get her in. Think of it as an act of love. Even if it has nothing to do with conception, she should be getting regular exams.