I HAVE A LIGHT BITE ON THE TOP OF THE

I HAVE A LIGHT BITE ON THE TOP OF THE LEFT THUMB ON THE TOP OF MY WRIST THAT KIND OF LOOKS LIKE A MOSQUITO BIT AND HAS A LITTLE HOLE IN THE MIDDLE OF IT AND ITCHES. I FEEL HEADACHY AND DIZZY OR LIGHTHEADED AND MY `t BLOOD SUGAR HAS BEEN WAS OVER 300 YESTERDAY AND GOT IT DOWN TO 168 AND IT WAS OVER 400 LAST NIGHT, THIS MORNING WHEN I TOOK IT ITWAS STILL 207 AND I TOOK IT A WHILE AGO AND IT WAS 199 I BUT HAS NEVER BEEN THIS HIGHT HAS BEEN IN THE 200'S BEFORE