You will have your portable oxygen with you so it is going to be a lot of trouble to go anywhere. You will find out even with a handicapped parking sticker you will bypass some stores because the parking places are not close enough to the doors and it is just too hot to walk the 40 or 50 feet from your vehicle to the door. Oh yea, you will probably want to get a van instead of a car because it is really hard to bend over. You get short of breath bending over. You will also want to get one of those handy grabber thingies so you don't have to bend over and be sure and get shoes you don't have to tie.
Velcro is better.
Not very stylish but who cares now. You don't care about impressing anyone anymore. You just want to breath. You can forget hot showers or hot baths, you can't breath where there is steam. You will have to be super careful and not get a cold because with your lung condition it will probably turn to pneumonia and you will end up in the hospital a lot.