I've heard a few say increasing acid in stomach helps reduce acid reflux?? so is taking nexium doing more harm? thanks.

A bit more complicat: Nexium is an antacid, meaning it eliminates the acid production in the stomach. This accomplishes two goals, one the reflux actually will decrease; secondly it is the acid that causes most of the discomfort, burning pain and damage to the esophagus(esophagitis) which can lead to long term complications. So , you can trust Nexium, and ignore the rest.