Is there a chance of me having an autoimmune disease with low TSH and positive antinuclear antibody test?

Hello doctor,

I checked my thyroid panel and got a very low TSH of 0.01 mlU/mL and normal T3 and T4. I also did the arthritis panel, and my antinuclear antibody test came positive. I do not have hyperactive thyroid symptoms, except for low energy and muscle tightness. I take tablet Cyclobenzaprine 5 mg for muscle stiffness. I am overweight and did not lose any weight. I do not feel my thyroid is enlarged. What is the chance I have an autoimmune disease?

Hello doctor,

Thank you for the reply.

I have attached my lab reports.

I also have a question. May I be iron deficient, as I am in perimenopause and have had heavy periods? I think the high blood MCV, MCH and RWD may indicate latent anemia. However, I do not feel thyroid symptoms to such a degree, so I thought it might be some nutritional deficiency.

Hello doctor,

Thank you for the reply.

1. I do not experience any of the symptoms. However, I experience muscle pain at times.
2. The only over-the-counter medication I take currently is Advil. I took tablet Cyclobenzaprine two months back.
3. I do not have any family history.

I read that positive antinuclear antibody in 1:40 concentration is often present in healthy people. Do you think I can take an iron supplement and then do a lab test in some time to check again?