24M, WFH, felt like a depressed for months — finally got a blood test done and the results were a reality check. [ W - 75 kg ]

Brain fog, no focus, low mood, felt off for no reason — thought maybe it's just the WFH lifestyle or too much screen time. But last week finally got a full body blood test done for the first time in my life.

Here's what came back:

Vitamin D: 10.10 ng/mL (Normal: 30–100) — Severely deficient

Vitamin B12: 170.59 pg/mL (Normal: 211–911) — Deficient

TSH (Thyroid): 6.24 (Normal: 0.35–5.50) — High, t-3,t-4 are normal though

Cholesterol: 217 mg/dL — Borderline high

Triglycerides: 185 mg/dL — Borderline high

Sodium: 133 mEq/L — Mildly low

Vitamin D at 10 when the minimum should be 30. Makes sense why I felt the way I did.

My question for this community — do I really need to rush to a doctor for Vit D and B12, or can I start OTC supplements? I've seen people take Vit D3 60,000 IU once a week and B12 tablets daily. Is that safe to self-start?

The TSH part is what's actually worrying me a bit. That one probably needs a doctor visit.

Living in a small town, so just looking for some genuine advice before I take any step.