Cathy and Tinlou,
Those of us with sensitive stomachs do have it rough. I look at people who can eat and drink and take anything they like and know they don't appreciate how good they have it!
My stomach usually feels out of sorts in the morning when it's empty. It feels better after breakfast.
Cathy if your stomach is way off, stay away from roughage and things that will irritate it further. Your stomach mashes things, and if it is inflamed it will feel worse when you eat things like popcorn, salad, etc. Try staying with softer choices, and baby your stomach for a while. Have you tried egg custard or something like that? It always soothes me...
I haven't tried apple cider vinegar either, for just that reason!
I know of nothing that will make it past a reactive stomach without setting it off. Oh...actually I just thought of one thing. When I'm sick with a fever, etc. I take Tylenol (generic verson) suppositories. They don't bother your stomach, but do the same thing as the oral type. You don't need a prescription for them, but need to give your pharmacy a heads-up because they might need to order them.
Just a thought!
Hang in there...