Inc. dose due to teething?

My DD recently has been put on prevacid solutabs and for the first few weeks worked GREAT. She has been teething though and is popping 5 teeth out at once. So, obviously, she has been more irritable, squirmy, and refluxing(silently) more again. Dr. Phillips had suggested she be on 10-12mg 3x/day and I’ve only been doing 30mg MAX. So, my question/s…While she’s teething should I go ahead and inc. it to the 36mg/day and see if it helps her w/her discomforts? Should I try some type of antacid instead for midday? If I do the 36mg, how can I break up a 15mg into a 6mg??? I know I can do 7.5(obviously) but how do you get 6 out of it? Also, should I do 15mg in the AM, and 21mg in the PM? Or give the 6mg midday? It’s just hard doing the midday due to empty stomach and all that. ADVICE?