OLP? Melanosis? Infection? Be cured?

So far i have been struggling with the pigmentation which was fine, now what is happening is the area where my upper teeths are touching the cheek feels rough(as if my cheeks are dry there and teeth rubs). I had a buccally erupted wisdom tooth which i got extracted but these weird patches are increasing bilaterally along with under the lips! What are these flaky marks? That looks like 'Y' or X... Dentists are saying after physical examination that it is melanosis, but why this dry roughness feeling :(. Dermatologists are saying go for biopsy it might be OLP :(. I am just 24 and I don't smoke too! Why is this happening to me! I don't even consume pan or tobacco ;'(.. I am worried if it's gonna affect my social life or general life in general. I try to ignore it as much as possible but again that dryness feeling screws it up! Also is lichenoid reaction(not olp) be cured?