Hi Catie,
I'm sorry to hear that you have to deal with this so soon.
I had my valve repaired in 10 months ago that has failed and am now facing a redo operation soon. I understand your anxiety.
I have had a history of GI problems, GERD, hiatal hernia, GI bleed from misdiagnosed duodenal ulcer. So choosing a valve is a big question for me. My stomach is also very sensitive, especially to antibiotics. Once a GI doctor recommended swimming and I could not agree more. It helped me a lot with my respiratory diseases and definitely with hernia/GERD(doctors can't say exactly which one I have, but I tend to think it's the hernia, since I agree with Paleowoman with the acid in our stomach). I have not been on PPI for a few years now, and refused to take them. Good diet, less coffee(I should quit really) and swimming all that works for me. Anxiety can also worsen hernia symptoms; Ive been anxious and nervous about my upcoming surgery and this whole situation, and that has affected my stomach as well.