I Had My First Shot Of Tornado, I Am Type

I had my first shot of tornado, I am type 2 diabetic, the shot was at 2 Seattle time, I noticed tinnitus, took my blood reading and it is at 255, when usually after Metformin HCL, it is about 120, never as high as 160 even unless I take a shot of a steroid. I just took the other half of my Metformin of 500 mg. Will see if it helps. I am a bit worried.