Hmm, maybe your poor stomach just can't take the alcohol.
There are many things I have had to stop enjoying completely because every single time I indulge, I pay. So maybe wine is something you need to cut out? OR, you have to find something that you can start taking before you drink wine. A friend of mine has serious colon problems, and before she eats ANYTHING she has to drink a fiber supplement. My father has my exact IBS problems, but dairy kills his stomach unlike it does mine (So far). So he takes lactase pills before he enjoys ice cream. And he usually ends up alright.
So maybe you should start to research things on to how to prepare your stomach to enjoying some wine. Also, make sure you're getting plenty of water! I have found that with my drinking if I'm not fully hydrated my after effects are much, MUCH worse. So drink plenty of water before and after enjoying your wine. Also, the morning after. Water is a magical healer! Lol!Hopefully you don't have to cut out wine completely. :(And most of the time after I drink I'm totally fine. Even if I have a crazy night.
That's because I keep water in me, and never over do it. But after drinking I've only experienced my normal extreme D, and lower stomach pains. I've never had back pains because of eating something! :0 I always have back pain because my back is messed up, but not because of eating. :|