Cerebellar strokes are tough. Your balance likely won’t get back to pre-CVA levels but you’ve probably understood that since it’s been 3 years. Therapy can absolutely help but you just have to have realistic expectations. More recent studies are showing we have more neuroplasticity at older ages than originally thought. That means things can get better. Balance and coordination take longer than a muscle strain so get back into PT and let them assess and work with you.