Heart Palpitations Increasing

Felicia
I'm 33 weeks today, and I've been concerned about increasing frequency of heart palpitations (pounding heart) accompanied by dizziness and shortness of breath. (I've had it off and on thought this pregnancy and my other pregnancy.) My OB referred me to a Cardiologist, and when making the appointment, they asked me to send my test results... My OB says he referred me to them because he can't do the tests. I'm so confused and nervous that I'll be wasting everyone's time. Anyone else with something like this? My mom reminded me that my grandmothers on both sides have/had heart issues.