It's quite a coincidence that this topic has appeared now. Months ago my son commented that my breathing seemed laboured and when he came up two weeks ago made the same comment and instructed me that I should see the Doctor. I had to keep him happy.
In January I had a cold that was accompanied by a bad chesty cough. It kept disturbing my sleep and I was tired most of the time and it has never gone away. In April I got something like the flu and for a few days I really didn't feel like taking the dog for a walk, which is unusual for me as I believe that if you have a dog, it needs to be walked and we normally walk about 6-8 miles a day. Before Jan some of that would be running as for most of my life I have been an exercise freak (squad level martial arts before injuries became a big problem and then climbing until a heart attack made me stop as I didn't want to risk me having a problem which would risk my partner). So since then it's been calisthenics and walking/running.
When I had the flu I still walked the dog but there was one day where on reaching the end of the sloped lane I live on (it's the South Wales valleys, so very little of it is flat), made me stop for a while to get my breath back, which came as a bit of a suprise. Since Covid I have hada blood oximeter so the next day I checked my readings on getting to the end of the lane but the numbers were normal, which did make me wonder what the problem was. If O2 was normal presumably CO2 would be too, so to me that only left engergy storage/transfer (in my engineers mind).
The Doctor rang this morning we had a chat and he told me to immediately report to the surgery for some checks. So I now have to make an appointment for a chest X-Ray, blood tests next week, given Asthma meds for a month and then have to have an Asthma test. The funny thing is my breathing is currently better than its been for months, possibly due to starting to take some mentholated cough medicine and doing breathing exercises which I started when I made the appointment. So it looks like I'm getting a lung MOT, for starters. Before I went I noted down some of the lung risk factors I could think of, which I gave to him. Asthma (ages 11-16), biweekly chest X-Rays between ages 12-16 (probably a lifetimes exposure under current guidelines), Exposure to Asbestos in the1980's (exposure being cutting it with a hacksaw and then filing it to fit, without any sort of mask), Smoking until about 10 years ago and vaping since. The next few weeks might be interesting.