Prescription refill symptoms and conditions

I have been taking lisinopril for about four months and my doctor increased my meds to 20mg from 10mg. Everything was fine except the tiredness so I take it at night before bed or I could not stay awake during the day. Then I wole up with numb feet one morning and just thought it was nothing as i get swelling when the weather gets warm. well the numbness is still there two weeks later. It is very uncomfortable and is moving up my legs and my arms and legs feel very tired and weak. Last night I counted the pills remaining from the last prescription refill and sure enough the amount left coinsides with the last refill, which by the way is a different manufacturer because the pills are a different color, shape and size. I went to the doctor this week and am waiting for the blood test results. I should know today. I am active and walk five days a week and work out at the Y three times a week. Has anyone else had funny feet problems?