I'm really worried because I've been dealing with indigestion for a week now. Everything I eat just comes back up with some sour water, and on top of that, I'm experiencing chest and shoulder pains, feeling lightheaded and dizzy, plus there's this burning feeling in my stomach. Is all this just due to acidity, or could it be something more serious like a heart attack? I'm not sure what to think and would appreciate any advice.

Based on your symptoms, it is important to rule out any serious conditions such as a heart attack. However, the symptoms you are describing, including indigestion, sour water regurgitation, chest pain, shoulder pain, light-headedness, dizziness, and burning sensation in the stomach, are more commonly associated with acidity or acid reflux. To help with your symptoms, you can try taking an over-the-counter antacid like Tums or Rolaids to help neutralize the stomach acid. Additionally, you can take a proton pump inhibitor like Prilosec or Nexium to reduce the production of stomach acid. It is important to follow the recommended dosage instructions on the packaging. If your symptoms persist or worsen, it is important to seek medical attention for further evaluation and management.