Would hyper-thyroid medication cause harm along with IGA nephropathy medications?

Hi doctor,

I am 56-years-old. I have IgA (Immunoglobulin A) nephropathy for the past seven years. It is being treated with Cardace 10 milligrams, Minipress XL 5 milligrams, Lipitor 10 milligrams, and fish oil capsules. I underwent an ultrasound which showed a solitary small nodule in my right lobe of the thyroid at 9 x 6 millimeters. Left lobe was normal.

Accordingly I had a thyroid test in:

1. TSH (CLIA) - 0.442 uIU/ml (Ref 0.45-4.5).

2. Free T3 (CLIA) - 2.65 pg/ml (Ref 1.4-4.4).

3. Free T4 (CLIA) - 1.09 ng/dl (Ref 0.8-1.8).

I do not display any thyroid symptoms. In addition I have a benign prostate (Grade 1) - no medication. My platelet count has been historically low varying from 128,000 to 150,000. The latest test in shows a platelet count of 122,000.

My questions are as follows:

1. Do the thyroid tests indicate that I have potential subclinical hyperthyroidism or is my test reading fine?

2. From my readings, it appears that the reference level for thyroid stimulating hormone (TSH) varies 0.45 to 4.5 and for some laboratories the reference range is 0.3 to 3.1.This makes a big difference as to whether my TSH level is within the reference range or below the reference level and hence indicative of possible thyroid illness.Please advise what can I do to increase the TSH levels through diet without resorting to medication.

3. If my TSH level at 0.442 is normal as it falls within the reference range although on the lower side, at what TSH levels should I be concerned that I could be diagnosed with subclinical hyperthyroidism?

5. Would hyper-thyroid medication conflict with my IgA nephropathy medication?