Many of us have done the same thing. I started shaving when I had a full head of hair, but I knew it was thinning. About once every year or two, I would let it grow a week or two just to see what was remaining, usually when off work. This year, due to COVID and not leaving home, I let it grow about 6 weeks. I had said I was going to let it grow until the barbershops reopened, and then I would get a barber headshave and tip my barber very well to help make up for his lost time at work. But after the 6 weeks I just could not take it any longer and took the matter into my own hands. BTW - I have very little hair left on top.