Fast heart rate at 34wks & 6days. Anybody else?

I've noticed last few days my heart will start racing out of no where. I'm usually laying in bed when it happens or eating. Not doing anything to cause my heart to start racing like it's going to bust out of my chest. Also noticed while my heart is racing I have a problem gasping for air and seems harder for me to breathe. Been feeling really hydrated and drinking a lot of fluids. Anybody else experiencing a fast heart rate or heart racing? I'm 34wks & 6days