Can you take both at the same time? I've been suffering since Monday afternoon, with the burning in the chest, belching, sour taste, and it seems like my anxiety is making it worse!!!! The OTC Zantec works faster than the Nexium, but I'm not sure if taking both is ok. Anyone feel fatigued all the time from heartburn? Any advice you share would be great. Right now I'm scared to eat anything, I feel the gurgling in my stomach, and then out or up comes the gas. I'm desperate to get rid of this!!!!