Greetings...I am a 48 year old, 5 2 morbidly obese woman. Diagnosed last week with anemia, DM2 and Hypertension...prescribed iron supplements, 25mg Chlorthalidone daily and 500mg Metformin 2xdaily but was advosed to start with one half tab of Metformin 2xdaily to start. I am dizzy, nauseous, persistent heaviness in chest, have developed a choking cough, abdominal pain, sob, throbbing headache at the base of my skull and this am had very black soft stool. I also am having a hard time digesting food. I have had a Roux-n-Y in 2000 so my stomach is not normal size and my intestine was rerouted. Not sure if that makes a difference or not. Also, I have had a history of alcohol addiction...though currently not drinking. Should I be worried about these side affects?