Very pleased nothing abnormal was found! Hope you get a quick GP appointment.
I did Google lazy oesophagus, it comes up with my condition, achalasia - however, mine was obvious on the endoscopy screen.
If it is that, it affects about 1 in every 100,000 people, so isn't very well-known including amongst GPs, and therefore can sometimes be mis-diagnosed. Barium swallows and manometry are usually used in UK to confirm it - it does need to be confirmed as it does usually need to be managed and/or treated.
As you have no diagnosis yet, and 'lazy oesophagus' may have another meaning too, I won't add any more here, but am happy for you to pm me if you want - or if you start another thread I'll post there if I think I have anything helpful to say. There's a website and an online support group, both of which I find good and helpful, and the NHS website info is accurate. There is also inaccurate and scary info, which is why I hesitated to mention it by name in the first place.
Really, really hoping for a quick diagnosis for you 😊