Do I keep trying or just accept that it’ll get worse?

Hi everyone, I’m stuck between the “do I keep trying to help my mobility even though nothing has worked so far” or “I should just accept it and adapt?” I’m just tired because I feel like nothing I do helps my increasingly worsening mobility. Exercise/PT creates more and much much worse fatigue that will last for days and rest and trying to walk and do what I can doesn’t help either. I’m exhausted and feeling stuck. Any advice? I use a cane and wheelchair both as needed but I’ve needed them increasingly since December. Thanks.