My Name Is Penny And I Take This Medication For

my name is penny and i take this medication for breast canser . ive been taking it for 4 yrs . 3 years ago i caught mersa and they had to operate on mt lung and ever sence then ihad troble walking well hard towalk at first buti am still in lots of pain unbeliveable pain when i stand up its like steping on nail and rasor blades could this medicine anastrozole causing then pain in my feet and legs? i took a test for dibetes and after the orange stuff they took my reading it was a 79 then i was puton metforman im confused im taking about 20 pills a day and i was wondering if there was some meds that can make you hurt this bad