I had total thyroidectomy yr ago I'm in 125 of synthroid (thyroxine). Today my TSH is. 112 and ft4 is 1.7 am I hyperthyroid I don't have any symptoms of hyper?

Yes. Because your TSH is suppressed you meet the definition of hyperthyroidism. However, depending on the reason for your total thyroidectomy this could be on purpose. If you had thyroid cancer, it is important to suppress your TSH in an attempt to prevent stimulating cancer growth. A suppressed TSH also has its risks, however, including cardiac arrhythmias and decreased bone mineral density.
Unlikely. Your free T4 is in the normal range. Lower than normal range TSH (.