MY PERIOD IS ABOUT 12 DAYS LATE. i HAVE TAKEN 4 HOME TEST AND THEY ARE ALL NEGATIVE. HOWEVER I HAVE STARTED TO FEEL NAUSEOUS AND MORE TIRED THAN USUAL. I GUESS MY QUESTION IS IF I WAS PREGANT SHOULDN'T THE TEST HAVE SAID SO. THE LAST ONE I TOOK WAS 2 DAYS AGO.. ALSO I AM A DIABETIC AND I TAKE MEDICATION FOR THIS. WOULD THE SUGAR LEVEL OR MEDICATION IN MY URINE AFFECT THE TEST?