When I bought I got got an extra spool of line made for that model. Just have to remember where I put it and figure out how to put it on.I am sorry. You have a lot on your plate, and it sure isn’t little stuff. I know it is the least of your challenges, but If I may offer a suggestion on the weed wacker string. Take a look to see what model you have and do a google search for [yourmodel] string. That should tell you the thickness of the string you need, like .065. It will also tell you if you can buy it pre spooled or if you have to wind it yourself. Armed with that info you should be able to pick it up at a hardware or order it online.
I'm so terribly sorry, you definitely have more than enough going on to be frustrated. Sending group hugs and special thoughts.Hubby had a very bad day ( sometimes he doesn’t even remember that we are married), our shed door needs to be repaired, I can’t find the string to replace the string on the weed whacker which needs to be done, and I realized I probably will never be able to show the cats again both due to illness and expense. Showing isn’t a cheap hobby.