Foods to avoid - greasy foods, spicy foods, acidic foods, coffee and caffeine bevs, carbonated bevs, alcohol...if a smoker, stop..
Each more meals but smaller meals during the day...and do not lay down for 3 to 4 hours after eating.....
Keep a journal as we all have different foods that are our triggers....this will better help you with what food you can eat and what you can not....
I was able to get my reflux calmed down to the point if I want to eat something that typically is a trigger I take my reflux meds an hour b4 I eat...this allows me to have some of the things I stay away from on a regular basis....and I do not require meds on a daily basis.
Keep in mind during a flare water could cause issues....so keep it bland for a while and be patient.
Hi and welcome to the GERD forum.
First, when stopping a med like omeprazole that is a PPI (proton pump inhibiotor) can cause rebound.....basically the symptoms come back...you need to step off these meds slowly to help avoid the rebound symptoms which can at times feel worse then what you started with.
Since you have a cough, did they look at allergies or a sinus issue as the root cause? Post nasal drip can cause heart burn...so do look into those possibilities Also a H2b may be more helpful then a PPI...a H2b is a histamine blocker instead of a PPI which blocks digestive acids from forming....if you have too much histamines that too can cause similar symptoms....
Talk with your Dr and have more testing.