Question about Continuing Arimidex past 5 years

I too am coming up to my 5 years on Arimidex, and am very scared to get off it...I had stage 4 cancer in 2007...had 3 surgeries, chemo, radiation, and 18/20 lymph nodes cancerous....I have since moved from PA to GA...So my onc doc is in PA...i have a regular MD, but she's not sure what to do after my 5 year mark, which will be in oct...any suggestions? thank you all