Why do both knees hips and ankles hurt severely ? i can barely walk , use stairs or get up out of seats . my shoulders and elbows are starting to hurt now because i am basically pushing myself up out of seats?

A reasoned answer would require a full review of your past and current history, exam and likely testing. The posted information is not adequate for analysis. Go see your doctor and have a proper evaluation.

You describe problems with your joints, but the question of an arthritic condition needs concerted evaluation and laboratory testing to decide on appropriate management. See your primary care physician and decide if a rheumatological consultation is indicated.

Your problem looks like neurological or rheumatological. You may want to start with physical therapy and as symptoms become clear, go to the specialist.