Esophagitis grade 2 can reoccure?

YES.: If the conditions that caused esophagitis reoccur, so also could the esophagitis. I note that you're taking omeptrazole. Don't discontinue it without discussing it with your doctor. Not only can baseline acidity recur, but evidence suggests that, after stopping a PPI, your stomach may actually become hyperacidic for a while, a condition called "rebound hyperacidity."

Yes: If you do not address reflux problem, donot take PPI or equivalent. Get checked for H Pylori.

Yes: If you have not seen your gastro enterologist make an appointment today. Common causes can be gastric reflux into the esophagus, but regardless of cause, if it continues, this can develop into a precancerous condition called barret's esophagus.