I Just Started Taking Pantoprazole Sod 40 MG Tab. I

I just started taking Pantoprazole Sod 40 MG Tab. I took one Friday and yesterday. Last night my heart was racing so fast it scared me. I could hear my heart beating in my ears. It was so loud and strong it sounded like the ocean! I did not take one this morning. My heart is pounding today as is my head. Should I just wait for the symptoms to go away since I am not taking the medicine anymore or should I do something?