A week before Christmas I noticed that I had swollen glands in the right side of my neck.  It wasn't accompanied by any other symptoms and I assumed it would go a way after a couple of weeks.  By 12th January I saw an emergency doctor who, having felt the glands, said they weren't hard, but suggested I see my doctor to be referred for a scan or ultrasound.  As I'm locked down in the Midlands I couldn't return to London to see my doctor so I decided to change my doctor's surgery to one near when I'm currently located.  That onlly took 6 days and I saw my new doctor on 20th January.  He said he'd do a blood test immediately rather then send me for a scan because there wasn't anything really warranting a scan/ultrasound at this stage.  The blood test results were negative.

On 26th January I had STI tests, but they all came back negative too.

The swollen glands come and go just like most other posters here have mentioned.  Today I sneezed and suddenly the glands became very painful affecting my swallowing and causing pain in the right ear/eustacian tube.  This is the worst it's been.

I've been having regular tests for COVID-19 since October and all have come back negative including the most recent one on 16th January.

It's a mystery and I hope we can all find out what it is that's causing this.