>>11812308actual doctor here. agree with this anon, just go see a doctor, and probably get a better PCP. yours sounds like garbage. an RBC number doesn't tell the full story of your blood cells (theres a full panel like iron, ferritin, transferrin, etc)but thats low enough you have some kind of anemia, which could explain some fatigue
when it comes to routine annual bloodwork, most doctors don't even order an insulin. there's a ratio score called the HOME_IR score that compares your insulin vs glucoseto see how insulin resistant you are.
but you should at least be getting glucose and A1c. an a1c of 5.7-6.5 is technically "pre-diabetic" but its a big fat warning sign to get it under control. metformin is cheap and easy to tolerate (maybe mild diarrhea for some patients). ideally, A1c should be monitored several times a year
vitamin D deficiency is a dime a dozen, everyone has it, its easy to fix with proper supplementation. most people are also deficient in magnesium.