Chronic medication

I only want to enquire if my Chronic medication is correct on the medical aid and add another script i keep receiving a PDF stating a 3 month waiting period i received one for the 4th time by now i know there is a 3 month waiting period but do i have to wait 3 months to check if my chronic medication is correct. Or can i only check and add once the 3 months has passed. By that time the waiting period is over then i'm allowed to get my chronic medication but i have to add and correct it first while it could have been done three months back