Remar is right if you absolutley must climb stairs think it through what you need and minimise trips up and down,...to the bare minimum. Hold the hand rail and do not carry objects, you dont need a fall. i would advise you to NOT climb stairs while home alone.
It takes several weeks for your body to heal after a hysterectomy so it's best to follow the Drs orders. Take things slow and get plenty of rest. Remar