Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You are 46 years old. You had laproscopic hysterectomy
leaving an ovary and part of cirvix. You had mucous like discharg, no odour but a slight burning around the vaginal opening. An incision in your belly button was moist, and has a white scab.
Whenever there is moisture post operatively suggests some infection. There appears to be an infection.
I advise you to consult your doctor for diagnosis and treatment. You may need to have culture and sensitivity of the discharge besides other routine tests for confirmation.
Wishing for a quick and comfirtable recovery.