Sounds like you have a tougher time of it, as medical conditions are restricting variety of healthy options?
FYI: Milk can be good for acidic stomach in that it buffers the acid and raises the pH a bit (assuming one can tolerate it ofc). Also, if suffering acidic stomach and have little appetite, slowly chewing on dry toast as well as sipping on some milk can help by providing some substance to soak up the bile (all obviously depending on what one can tolerate).
In my life I didn't have the opportunity to eat unhealthy foods because my family and I have been poor for like ever, so in some way I was eating very healthy cooked food, rarely did I get sweets or soda only if we'd visit someone specific that had soda at home and was a soda drinker.
When I grew older I was a health freak, preoccupied with maintaining a healthy diet. I made a multitude of huge errors that impacted my health, I wasn't able to fully study the diets I was making for myself, I missed important clues though I was constantly researching. There are so many things to keep in mind when switching to a diet and it's better to let professionals do it case by case.
Recently I delved in a lot of variety of foods, I tested things others would have on a daily basis and I never got the opportunity to try, I felt like I finally caught up to society. I developed a sense of what I like and realized unless I have medical advice and medical files with exactly what I have, it's better to not change my diet too much because I won't know what I'm doing or why I'm actually doing it, and I have done wrong by my body and health before with pieces of information.
I have to keep my medical suggestions, the doctor said diet in the stomach acidity case is as important as the prescribed treatment. And the list says the suggestions are hard nos, and they are a lot already. Then I have to keep in mind the kidney diet as well, and focus on desserts that don't aggravate my conditions. For example chocolate is making the stomach acidity worse and is high in oxalate. I used to dislike it but now when I like it I'm not allowed it anymore. On chocolate I have probably cheated the most, a bit of chocolate in this, a bit in that, the taste is so pure and easy.
I have decided that the stuff I ate when I was on keto was not a good idea for my stomach and my kidneys can't have too much protein so I said, well now it's probably time for refined carbs to be accepted. I didn't expect cornpuffs to have less oil than chips and they're cheap and so tasty so I do engage with cornpuffs quite a lot. Sweets particularly on an empty stomach are a no, so cornpuffs are quite versatile and helpful in comparison to other treats.
Milk offers me natural calcium, sometimes it is fortified with a bit if it's vegetal, calcium of good nature and with limits has been shown to prevent kidney stone formation (calcium in supplements has been oddly shown to make it worse). They're saying that the far content, 3.5 percent would make GERD acid reflux worse but most things in life have more content of fat, although I choose skim milk because they say it's better.
My bone demineralization also demands calcium. But I don't wanna go crazy with big supplement dosages and I have prescribed magnesium for stomach and additionally supports bones so I should be able to absorb calcium from diet with the help of the magnesium, without having to overdo it.
I'm about to switch my hormone meds that contribute to bone demineralization as well and although I will bleed and lose nutrients for up to 6 months I hope I can survive well enough and recover after. I have been through it before.