Sprainankle 4yrs ago,ive had chronic ankle pain,weakness,instability,swelling for 4yrs. i've had help-doesnt get better.doctor says give time. thanks!

Instability: It is unlikely that if you have already given it 4 years and it is still causing problems that it will get better at this point by simply giving it more time. It is likely that you tore a ligament or ligaments in your ankle that just never healed. Choice would be either to live with it with it without some form of orthotic or consider a surgical opinion.