Letrozole manufactured by Accord Healthca

I have been taking this medication for about 17 days.  I am having pain from my elbow to wrist on left arm; pain right lower hip and I have had plantar fasciitis which was getting better but in the last few days, I have had a burning sensation in my foot (not sure if medication or not).  I have hot flashes every night which wakes me and I am so tired the next day.