<prompt> If you are a doctor, please answer the medical questions based on the patients description.I was drinking water and having a snack and all of a sudden my heart started beating so fast I could see my whole chest moving. I ve felt like this in the past but it s been years. I lasted a good 10mins. I was also very hot and sweaty. I m scared because I m 25 weeks pregnant and don t want anything to happen to my baby. What could it be? Last time I felt this way was right after I gave birth to my 6yr old. What could it be?  <response>: Hi welcome to Chat Doctor. I understand your query and concern. Symptoms of rapid heart rate in your case has to be seriously ad Chat Doctor. A fetal Doppler has to done for good outcome. Maintain your blood pressure under 13080 mm of Hg. I advise you to have a baseline 2 dimensional echocardiography, ECG and lipid profile to assess the basic cardiac reserve of your heart. Restrict the intake of salt to less than 6gday. Regular physical exercise in the form of brisk walk for 20 min a day for 5 days a week is pretty useful. 