My impression from what you wrote is that you need to have complete testing for Celiac Disease. The white plaque on your tongue, the relux, the maladsorbtion suggest this possibility. You may do better to avoid all gluten foods, not only wheat but barley and rye. Since you have been avoiding wheat unless you start eating it again for up to 3 months the blood tests may not be positive. It is often helpful to have the genetic marker assay or the molecular serology test done and a gluten challange diet is not necessary.
I found doing cleanses and detoxifications were very helpful. I have found taking a zinc suppplement clears up whiteheads (white bumps) along with Vit C and B vitamins. Epsom Salts sweat baths help clean toxins from the body.