I've Been Taking Atenolol 50mg + Amlodipine 5mg For 21/2

I've been taking atenolol 50mg + amlodipine 5mg for 21/2 years and have serious memory loss and if I'm in a crouch position, I can't get up again unless holding on to a chair, wall etc. I've been power walking up the Mount Royal (Montreal) every second day for the last 30 years, I'm 5'5" and weigh 115 pounds. I never eat junk food and have a small glass of wine on rare occasions.
Should I discontinue atenolol?
I consulted Two other doctors and I'm told to stop, and use only amlodipine. I see my family doctor ounce a month and I'm told that I'm fine but regardless these results she keeps me on atenolol.
Thank you,
Sincerely,
Helene Lafleur