I've been feeling ongoing fatigue, some weight loss, joint pain, and occasional swelling in the leg where I had a fracture 7 years ago. A recent blood test showed macrocytic anemia, low Vitamin B12, severe Vitamin D deficiency, high ESR, and mild RBC shape abnormalities. I’m not on any regular medications. I’d like to know the best treatment plan, especially regarding supplements for B12 and D3, and whether further tests (like iron, folate, arthritis panel, or imaging) are needed. Also, is the old fracture causing the swelling? Can these supplements be taken together safely?