Medical Assistance for Someone on a Fixed Income?
I would recomend you speaking with the hospital and see if something can be worked out. Depending on your income the hospital could comp some of the bill making it manageable for you.
Receiving Social Security Survivor's Benefits?
I would call social security office. Someone may have been given benefits to use to support you as you were growing up. Then you will know and the rest is up to you.
Free Yarn for Charity Projects?
Many times in your area you may have what is called Freecyle a place to ask for items you may need or to give away. I would start there. However, start on the web,or in yahoo groups, you may find something there.
Quick Knee Protection for Working Outside
Another suggestion: I used an old pillow that I was going to throw out. It works great for kneeling and sitting.