Inester,
POTS was the first thing I was diagnosed with - before I or any of my doctors understood that I had ME/CFS. I also have other dysautonomia sympotms and struggle largely with gastroparesis.
I have seen Dr. Grubb. I have also been to Vanderbilt as a research patient twice. Now, this was 5-6 years ago, but my experience is that Vanderbilt has a better grasp on the combination of Dysautonomia and ME/CFS.
Neither one specialized, nor really focuses on ME/CFS so don't expect either one to really address it. However, both are excellent in helping with ideas for POTS.
I found Dr. Grubb's treatments all made me sicker, and as I began to understand ME/CFS I also began to understand why. The things he gave me worked for many POTS patients, but not all POTS patients are ME/CFS patients. So the medications complicated my ME/CFS. However, he did teach me many helpful things and I still take midrodine on occasion. But I agree that most of this you can also learn online.
When I saw Dr. Grubb, I waited 4+ hours in his waiting room for my appointment. I also found the office to be very very difficult to deal with.
Now, Vanderbilt. I went as a research patient. I spent 10 days - got extensive autonomic testing, as well as 8 days of medication trials. I came home with prescriptions that were helpful.
A couple years later, I had come to understand ME/CFS and they had me come back for another 10 days research. This involved one study that was focused on POTS and CFS. So they do have some knowledge of CFS - though that is not what they treat. I again came home with changed prescriptions that have helped deal with my POTS. And the doctor I saw there still communicates with me through email, though they can not prescribe anything now that it's been several years since I was there.
Please feel free to send me a message if you have more questions. And I highly recommend dinet.org as was suggested above. The forum is very informative.
But also, please understand that many people with ME/CFS have POTS and other autonomic dysfunctions, BUT there are also people with POTS who do NOT have CFS. And these people often respond to different treatments and medications than those of us with CFS.
Hope this helps