My thyroid was checked and I had a TSH 10.2 and a T4 12.4. My doctor said I was subclinical hypothyroid and may or may not need treatment. She said I shouldn't be feeling too bad with those results.
Your TSH is very high and indicative of primary hypothyroidism and need to be treated ASAP !
You should see an Endo to start you on Levothyroxine, depending on your weight and age and other conditions that you might have he should decide on the initial dose but usually they give 25-50 mcg/day.
If you live in the USA then it is better to start on a brand name Levo and not the generic form, since this will keep your dose consistent if the supplier changes.
When did those blood test were done?
It is very important to test for the thyroid antibodies, there are two who can cause hypo, antiTPOab and TGab, if either is positive then you have Hashimoto's disease which is an autoimmune disease and the cause for your hypo.
Wishes for good health,