What Causes Elevated Level Of TSI In Blood?

Okay. I just reviewed some test results on My Chart this evening and my doc s office is closed. To make a very long story short, I got sick in January and am now on propnolol, norvasc, methymazole and warfarin. My T4 was 7.8 and is now 1.8. My T3 was 27.2 and is now 3.1. My TSH was 0.011 and is now 0.009. But TSI was 3592 and is now 4696. The table says that normal TSI should be 150. This concerns me.