Hi have been dizzy or light headed for 3 weeks is accompanied by a nervous stomach, am always tired sleep all the time now.. went to the Dr's had blood test including the 3 hour blood sugar test, only thing blood shows is that after drinking glucose my first hour test my levels went down instead of peeking. I also recently quit smoking about 7 weeks ago.. I have normal BP am not over weight.. was told I could have vertigo given a script but makes me feel worst...