You’re welcome and I hope you keep pushing to find an answer. From everything I’m seeing about high B-12 readings in blood, it can signal the possibility of actual low B-12 with little being utilized in your body.
So you may have a deficiency especially with some of your symptoms. I’d hate to have that missed when to start with, you could have Vit B-12 supplements to see if it helps you.

You might start by writing out what you want to say to your doctor or send him/her an email stating your concerns. I know sometimes they’re so busy they fail to take in some of our considerations! We know our bodies better than anyone else and when we start experiencing strange symptoms we need answers. I went through similar 3 years ago with my doctor, whom I have always respected…and as a ‘lady of age’ I felt I was getting dismissed when I was clearly, seriously ill.
In my case she wasn’t taking blood work and that was the downfall. Anyway, that’s water over the dam and I’m grateful things all worked out. But it was a reminder to continually advocate for ourselves. The key is to be persistent yet pleasant. 😅