Talk to Internal Medicine on Back Pain Ans Anisocytosis

I've been having some issues with my back like it hurts alot and the bones in my body make a cracking sound even when i make the smallest movements and breath. like when I take a deep breath my chest and back bones crack. nowadays it hurts alot and i can't figure out the reason why it's happening.

also i got my blood test done and the findings showed anisocytosis is it something serious, should I go to the doctor. the platelets and color of the cells are perfectly fine. I'll get my vitamin D test results on 12th