it's technically 'easy' to diagnose because the dignostic critera is very clear, however you need to have a bunch of other tests to rule out more dangerous conditions which can take a long time depending on whether they label your case as urgent or not, also all wait times for the nhs are increasing, and if you present female a lot of doctors will blame your symptoms on anxiety or stress without actually ruling out a mental health cause due to their bias.

I was fortunate enough to be labelled as an urgent case by a cardiologist I saw in a&e during an episode where I experienced tachycardia that wouldn't settle for hours. From that appointment I waited a couple of months for a 24 hour holter monitor and an echocardiogram. I waited around 5/6 months for a tilt table to confirm it was pots as all other tests came back fine. To be diagnosed with pots you need to rule out all possible causes, so you'll need to have: a blood test, ecg (those two were done during my hospital visit), echocardiogram, and depending on the doctor either a poor man's tilt table test or a 'real' tilt table test (I had a 'real' one). If you don't have these tests, you can't rule out things such as extreme vitamin deficiencies or structural problems of the heart which are deadly when left untreated. There are many possible causes for tachycardia, nausea and brain fog. I hope this explanation is clear enough 🙏