Wow -- congratulations Nick, you are doing great! Your frequency is better than average, especially after a month or two! As for the Gas X, it didn't really help me much, so I only ended up only taking it if the gas was painful -- I think it helped pass it. Even as my system "matured" it was never able to pass gas like with a colon... but that is pretty typical.
I didn't have acid reflux issues, so I never took Zantac and don't really understand why that would be prescribed for your stomach knots. Could it actually be mini blockages? I got them after multiple surgeries and my doc and I have written off a lot of that pain and discomfort to post-surgical adhesions limiting colon movement. For immediate help if the gas is not improving, I'd recommend looking up "gas causing foods" to see what happens if you eliminate those from your diet.
I did take Imodium (or prescription Codeine Sulphate when it was bad for a while) for liquidy stools, but it doesn't sound like you need that. I would recommend keeping Imodium on hand just in case though. A concern now, should you eat something that does give you liquid stool, is taking that and staying hydrated because you can dehydrate so quickly without a colon.
It does take a little while to figure out your personal food list -- what is tolerated well vs what is never tolerated vs what is not tolerated well but eaten anyway :-) But even when you do figure it out, consider trying some "borderline foods" again in 3-6 months as your system is adapting and your colon tissue will change. The recommended early "short list" of things to avoid at first is raw fruits and vegetables, nuts & skins cooked or not, and highly spicy or acidic things...and chew, chew, chew! Other than that, a lot of people with pouches find that sugar can be a problem for them, but it seems to be one of those things that might be 50/50 (likely dependent on the individual and their intestinal/pouch microbiota.) I would say the same goes for probiotic supplements as well, some swear by them while others swear off them.
Blessings for a healthy road ahead, Jennifer