Thyroid issues after Covid??

So I went to my immunologist today and had some blood work done. My free t4 level which measures how well your thyroid is working is really low indicator of hypothyroidism. I am only 21 years old. The doctors are also thinking I have an autoimmune disease, possibly Graves’ disease. ( I have shaky hands extreme fatigue. I get super hot really fast and I have lost 10 pounds in the last month ) Anybody have any problems with thyroid after Covid ?tested positive on November 6 still battling symptoms and out of wack bloodwork.