Oral lichen planus! For malignancy?

So i went to my local dermatologist, he said you have OLP, now i had previously visited multiple dentists they said its normal melanosis. My dermatologist has prescribed me, kenacort oral paste once a day, tacroz forte 0.1% once a day, aprezo 20mg once a day fr a week then twice a day frm 2nd week,and becosule z. So should I start with these? Or should I go for biopsy first and get confirmed? My symptoms are buccal mucosa both sides feel rough it has some pigmentation, no white lacy lines, itching or burning, nothing. And under lips also little roughness along with sour feeling when licked and sometimes stingy feeling when it gets inflamed(idk why it gets that). Are the meds prescribed safe? I read tacrolimus increases chance for malignancy? And what about homeopathy, please suggest if i should go for homeopathy instead if it provides safe medications... i am M24, non smoker, non tobacco or alcohol user. Attached image for Bm and lips. Plz tel if its olp or not as wel!