No respect to customer confidentiality

I normally shop at the dis-chem Newmarket on a regular basis, so a week ago I went to the clinic and asked for assistance as I was always feeling tired. The receptionist (Karabo) assisted me and I was happy. I then came with a colleague of mine on the 14/3 we were laughing and she walked passed us and said oooh the B12 is working, I looked at her and was a bit embarrassed as how she disclosed what I went to do at their clinic. I told her what she did was unprofessional and I will defiantly report her and she laughed it off. I am disgusted as to how could an employee of dischem disclose customer confidentiality like that. I will no longer be doing my shopping at dischem if their employees do not respect customer confidentiality.