Knee pains and crunching. Up steps.

Hi, I m writing about my situation, present under ayurvedic medication. I m 30 male construction professional, some times I have to walk around 10k due to the work. Mostly my routine work site visiting or office work. April 2021 i got pain in back of my knees, i thought because of my work, I took long leave because of personal problems in that time no more pain because not much physical activities, then next month i heard knee crunching then i consult Orthopaedic doctor they suggested x-ray and blood test. X-ray (not cleared)but he said knee gap very less and vitamin D was 19 he gave some multi vitamin tablets and vitamin D capsules. I m not satisfied his treatment then consulted another dictor he gave some glucosamine,multiple vitamin tablets. I scared because per day i have to take around 12 pills, 2months later he gave 2 injection on my knees and told it was just lubricants no need to worry. Still same getting more noise difficulties to getting up from floor and getting up steps.