My wife was in the hospital for 7 days, she went in due to asthma symptoms ( Shortness of breath and a tight chest), she was told that she has a vocal cord problem, and is also taking Xanex for stress. She did not get out of the hospital bed for 7 days, her legs feel like jelly, now 1 week of being home she can only walk with the use of a walker. What is the problem?