Yes, they all mean something...
If you've been diagnosed with diabetes, your A1c indicates that you need you should try to get better control. You can often do this with diet, but it might require medication. Look into the low glycemic diet - that's eliminating foods like breads, pizza, pasta, pastries, sugary snacks/drinks, etc that spike your blood sugar creating a need for more insulin. Concentrate on veggies, meats, healthy fats, etc - things that will keep your blood glucose stable. If you're not on medication, you might need to talk to your doctor about starting something. Metformin is often the first med tried.
As I noted above, high RDW means that your red blood cells are too large; this is macrocytic anemia. The 2 main causes are low vitamin B-12 or excess alcohol intake. There are numerous causes of B-12 deficiency.
High cholesterol/triglycerides (lipids) are often a symptom of hypothyroidism.
Low carbon dioxide can be caused by hyperventilation, aspirin or alcohol overdose, diarrhea, dehydration, or severe malnutrition. Liver or kidney disease, a massive heart attack, hyperthyroidism, or uncontrolled diabetes.
What was your RDW result with reference range?
High RDW indicates that your red blood cells are too large, which, in turn, indicates B-12 deficiency, also known as macrocytic anemia.
Yes that Vitamin D of 6.3 is horribly low. Should be at least 50.
If you don't take your thyroid med regularly, then you really don't know what your thyroid hormone levels are. I suggest that you take your meds religiously for a month and get re-tested for Free T4 and Free T3 (not Total T4 and Total T3) and see what is needed. That way you will know how much of an increase is needed for your daily dosage. Along with that you need to test for Vitamin D, B12 and ferritin and then supplement as needed to optimize as outlined above. When you have new test results, please post them, along with reference ranges and we will be glad to help interpret and advise further.
Based on limited test results, your thyroid hormone levels could be dangerously low. Don't hesitate to go to ER if you start feeling worse.
From those test results I can understand why you are having severe symptoms. Your Total T4 is way below range, and your TSH is way above range. All together, it appears you have Hashimoto's Thyroiditis. With Hashi's the autoimmune system erroneously identifies your thyroid gland as foreign to the body and produces antibodies to attack and eventually destroy the gland. As this proceeds, the output of natural thyroid hormone is diminished and has to be replaced with thyroid medication. Note that the T3 Uptake and Free Thyroxine Index tests are outdated and not nearly as useful as tests for the biologically active thyroid hormones, Free T4 and Free T3 (not the same as Total T4 and Total T3). In the future you should make sure they test for both Free T4 and Free T3 every time you go in for tests. You really need to know Free T3 levels because that is the thyroid hormone metabolized in all the cells of the body to create the energy you need.
Are you sure you are taking 125 mcg of Synthroid daily? The reason I ask is that I have never seen anyone with such low test results for Total T4 when taking that much T4 med. Assuming that 125 mcg is correct, that would mean you are not absorbing much of the med at all. For best absorption T4 med should be taken on an empty stomach about one hour before eating. Also, some supplements can affect absorption. Can you think of anything that you are doing that might adversely affect absorption? If not, then you need an immediate, significant increase in your thyroid med. Our experience is that you will need thyroid medication to ultimately get your Free T4 at least at mid-range, and Free T3 in the upper part of its range, adjusted as needed to relieve symptoms.
In addition, hypothyroid patients are frequently too low in stomach acid, and that can cause poor absorption. That frequently results in deficiencies in Vitamin D, B12 and ferritin. If not tested for those you should do so and then supplement as needed to optimize. D should be at least 50. B12 in the upper end of its range, and ferritin should be at least 70.
If that test date of 1/21 is correct, it is way past time for your doctor to take action. What response did you get from the doctor?
Please check the lab report for the T4, T3, and Free Thyroxine reference ranges. All the ones I have seen listed a low limit and a high limit like this: 10 - 19. If you have those please post them as well. Also, please tell us about any other symptoms you have.