low b12, d, and ferritin. could all of these be causing my symptoms?

B12: 219 ferritin: 24 D: 27

for the last 3 years I’ve had severe brain fog, DPDR, dizzy, sebhorreic dermatitis, androgenic alopecia. I also have the copper IUD so I have heavy periods and speculate it may be contributing to my anemia. just want to know if anyone experienced these symptoms and if they ever went away