Hello,
From the symptoms it does not look like a STD but it is good that you have had the STD panel tests. From the symptoms it can be eczema or seborrheic dermatitis. It is caused by overgrowth of fungus and that causes flaky, dry, white to yellowish scales to form on oily areas on the face, upper torse and sometimes the genitalia. Treatment for both is entirely different and so I would suggest a dermatologist’s evaluation to confirm the diagnosis first.
I sincerely hope that helps. Take care and please do keep me posted on how you are doing. Warm regards.
Thank you for the information, I will take your advice and set an appointment up first of next week. I'll post here with the results, thanks again....