I have the same problem. I get out of breath and my heart beats like a drum in my chest just making the bed. So, now I pull the sheet and blanket up and straighten it out, then I watch a little TV or play on my computer. When I am ready, I go back and finish it up. Some days I don't make the bed because I want to do a load of laundry. It's all about not minding doing it in stages. Give yourself a break. I think you are beating yourself up because you wish you could still do it like before. Well, guess what, you can; it's just doing it differently and ending up with the same results. Accepting that you have to do things differently than before is the hard part. Just remember you can do it. Good luck and keep smiling.