Going to get blood tests, to find why I could be feeling tired, lethargic and depressed. Please help me to complete my list of tests to do.

Sometimes my hands/feet go little numb, sometimes tiredness is crippling, making me unable to do anything but watching yt/playing games, sometimes there is also a brain fog.

• CBC
• thyroid (t3,t4,tsh)
• ferritin
• b6/12

Anything else?