I have type2 diabetes, mellitus. i take metformin. i am having stomach issues daily and for the last couple days, worse today, i have pressure discomfort across my chest into my arm pits. sometimes, i have some low pressure type pain in my chest?

Time to see a doctor: Chest pressure, chest pain, or trouble breathing in an older adult are signs to go to the ER. Chest pain can be a heart attack. One should not drive herself (it's safer to go by ambulance). If she turns out not to have heart attack symptoms, the ER will also have evaluated for problems such as reflux, esophageal spasm, myocarditis, pneumonia, etc... X-rays, EKG, and labs can be done at the ER.