Laughing in your face symptoms and conditions

Hi, I am 25. I have taken omeprazole 20mg. for 4 months for my GERD, and after the fourth month, I started having these abnormal heartbeats. I am really worried if these are side effects of omeprazole, and if this medicine may cause permanent damage to the heart. So I decided to see my PCP and requested a change in medication, so he prescribed me 6 month-refills of Aciphex 20mg. It’s my second week now, and I feel this weird itchy feeling inside my chest. I feel like I am always tired, and breathe hard than usual. Id this a side effect of Aciphex? Should I stop taking Aciphex? And does achiphex damages the heart muscle, or cause CAD?