Woke up last night to a 110 or higher pulse rate, dizziness and neausa. Wasnt having a nightmare or any anxiety, and had 1 cup of coffee at 10 am yesterday morning. This morning, still feeling weak with a slight tightness in my chest. Im a 26 yo extremely active
Hello dear, thanks for your question on Chat Doctor. I can understand your situation and problem. Since you are having tachycardia (high pulse rate), dizziness and chest tightness, better to rule out cardiac cause first. So get done ECG. If ECG is normal then no need to worry much for cardiac cause. Acute gastritis can be the cause for such symptoms. Because nausea and chest tightness can be seen in this. And coffee actually worsens this condition. So you are having mostly acute gastritis. Better to avoid hot and spicy food. Avoid large meals, instead take frequent small meals. Avoid affine containing Chat Doctor.  Take Proton pump inhibitors. Don't worry, you will be alright.