Hi Tim, welcome to the madhouse
It is a shame that you have lost your job, I would be lost without my work, it provides me with a routine and keeps me active and gives a sense of normality. You should find something to do on a regular basis, to develop a new routine that you can fit into. Perhaps some voluntary work of some kind, where you are not under any performance pressures. A job working in one of the charity shops or something along those lines, light work but still get that sense of purpose, somebody has to do it, why not you?
Yes you are so right, the healthy do not understand what we go through, neither do they seem to want to know, we are invisible, we don't exist. Or the exact opposite, that stare you can get, when you are struggling to breathe, seemingly waiting for you to die in front of their eyes without concern. Truth is, it is the look on their own faces that would cause me to burst out laughing if only I had the breath at the time to do so.
Hay fever also seems to start to affect a lot of us when we develop COPD, it has me, my second year of hay fever that I never suffered with before my COPD.
Keep up the walking Tim, it will only get get harder otherwise. I know it is hard work and difficult to keep walking, honestly. It can only get worse if you stop. Stop exercising for just 2 weeks and you start to lose conditioning, followed my muscle mass and it will take months to regain it all. Please keep walking, for your own sake, you are NOT too old to exercise, start using a scooter and you may end up relying on it all the time, which will mean giving up some independence. Keep walking, remember "the more you do, the more you CAN do". Taking the easy option is not always the best course to take. Exercise is the next best weapon to fight this disease after giving up smoking.