After I swallow nyquil I felt burning scary feelin in stomach 1st it happened. I take only omepremazole 1 in the morning what happened I'm scared?

Well. Did you take it on an empty stomach? Sometimes taking even the mildest of drugs can create havoc on a stomach that already has issues, next time try having a little something to eat before you take any meds whether they require food or not. I hope you feel better!