With a TSH of 85, you most likely have an autoimmune system disorder called Hashimoto's Thyroiditis. With Hashi's the autoimmune system erroneously identifies the thyroid gland as foreign to the body and produces antibodies to attack and eventually destroy the gland. As this is occurring, the output of thyroid hormone from the thyroid gland is gradually diminished and the TSH rises in an attempt to stimulate more output from the gland. With the decreased output of thyroid hormone, you will start to have symptoms of being hypothyroid.
With that TSH result you should be tested for the antibodies of Hashi's. Two tests may be required. If the test for Thyroid Peroxidase antibodies (TPO ab) is negative, then a test for Thyroglobulin antibodies should be done (TG ab). Hashi's will be evident in one or both tests.
In addition to those tests, you should also be tested for the biologically active thyroid hormones, Free T4 and Free T3, every time you go in for tests. Also, if possible you should be tested for Vitamin D, B12 and ferritin. Hypothyroid patients are frequently deficient in those. D should be at least 50 ng/mL, B12 in the upper end of the range, and ferritin should be at lest 100. You can supplement to optimize those. I also recommend testing for morning serum cortisol. You can read all about this in the following link. I highly recommend reading at least the first two pages, and more, if you want to get into the discussion and scientific evidence for all that is recommended.
http://www.thyroiduk.org/tuk/TUK_PDFs/The%20Diagnosis%20and%20Treatment%20of%20Hypothyroidism%20%20August%202017%20%20Update.pdf
The only risk you face is if you are unable to find a good thyroid doctor. By that I mean one that will diagnose and treat clinically, by testing and adjusting Free T4 and Free T3 levels as needed to relieve symptoms. Symptom relief should be all important, not just test results, and especially not TSH results when taking thyroid medication. Do you think your doctor will be willing to treat clinically, as described? If not, you might consider giving the doctor a copy of the link and asking him to reconsider.