Just popped back into this thread and am sorry to see some familiar names still struggling.
DD is now on 5 months of being bedbound and she's been getting worse.
In any case, there's been some progress and I have a few things to share that might not have been mentioned already.
Bearable is a great app we've been using to record symptoms, activity and mood. I can't recommend it highly enough. It's free but you can pay a bit for the insights info. The best thing is that you can export the data if you want to share it with a health professional. It exports as a cvs file so it's not especially user friendly for the recipient, but if you know how to use excel, you can make some graphs, filter it etc. Or you can just screenshot the relevant info.
We also did the 10-min standing test which showed she had PoTS symptoms. So we had a consultation with a private PoTS specialist cardiologist at the Nuffield in York this week, via webcam as we live 4.5 hours from York. It was £200. He diagnosed PoTS immediately based on the symptoms info from the app and her standing test results. He didn't want to do a tilt test because they don't always show you have PoTS as the raised HR on standing doesn't happen all the time. He said it's better to crack on and start treatment and that will show it either way.
He's prescribed Ivabradine which my research shows is one of the most effective ones. He also advised a few diet changes etc, everything that's on the POTS UK site. Anyway, just mentioning in case anyone wants to speed things up and doesn't want to wait for the NHS or to have to see a non-PoTS specialist.
He's also given us a few letters, one saying DD should shield and another for A&E saying if she goes there, to give her IV saline for 8 hours, instead of just doing the usual tests and sending her home, which has happened twice.
Happy to answer any questions. Just tag me in case I miss the post.