Good Afternoon ! First of all you are not dying, which is the good news. It does feel to me like you have major anxiety going on. Heart palpitations are common in pregnancy as well as heartburn, indigestion and fatigue.
The good news is that anxiety disorders are among the most treatable. ... The first step in CBT is to understand your anxiety. By seeing a therapist for your anxiety and working on CBT you are on the right road so keep on putting one foot in front of the other.