SEVERE KNEE PAIN. After exercise.

41 years, male, I have been having knee pain since 2 years, can' fold my right leg and can't straighten it fully. consulted orthopedician X-Ray ok, bone profile ok, Vitamin D low 8.2 & PTH high 161 Calcium 10.7 & prescribed Bon dk 60k 1/week 8 weeks and 1 /month 1 year with Shelcal 500 2/day for 6 months taken but issue repeats. due to this can't stand straight, due to shoulder pain can't lift hand to wear shirts, lower back pain also irritates. consulted acupressure & acupuncturist but no use, currently taking ayurvedic medicines but no improvement. started varma treatment. have high bp 160/100 from 15 years and taking Amlopress AT, from 6 months severe hair fall noticed, memory loss from 2 years. heavy sweating while eating food, depression are the other symptoms. i have to travel a lot on office work road travel in local taxi and air travel outside city Also had Hip joint, calf & piriformis joint pain started leg lifting and leg folding exercise this is now reduced after exercise.