Does anyone have trouble with knees flexing/ collapsing beneath them as they walk . Getting stiffness and pain when under load.

Yes Johnnie before I went on meds my left knee used to hyperextend - backwards - when I walked - it was grim and painful. Once meds kicked in everything started to improve. Also I did exercises recommended by the physio - which probably helped, but I really needed meds by that point. are you getting any help with this?