Hey!
Just wanted to add to the crutches ordeal. When they sent you home, after crutch training, they should have adjusted the crutches to the correct height. When you are standing up, the crutches under your arms should be about 2-3 fingers below your armpit, and you should not have to lean forward onto them to reach the handles for you palms/hands. You should bear weight with your arms, NOT your armpits. There are nerves in you axillary area that can be permanently damaged. You should NOT have sore armpits at the end of the day. Use the strength in your arms to get you around, don't lean forward and support your weight with your armpits. Crutches are adjustable. If they aren't working, or if they are too tall for you, you might want to go back and get re-fitted. Crutches can be adusted at the handles, and the length. It is very important. The nerves under your arm could be permanently damaged, which could affect your fingers. Also, as mentioned before. You want to protect your palms as well. It sounds like, however by your description of aching armpits, that your biggest culprit , and most threatening to your wellbeing now, is the crutch fitting, or possibly relying on the wrong part of your body to hold you up. Please let me know if you have any further questions. I will try to help.
TC