Months? Ugh! You poor thing!I'm wondering the same thing Evo, it just seems so weird that it just suddenly happened now. I have been drinking coffee for years and had never had a problem before, but these past few months I haven't been able to touch the stuff.
Every once in a while, I will hit a spell where my stomach says it just won't take any more coffee, but that's usually after I've been doing something that has me drinking way more than usual. At most, I'll go about 2 weeks where I have to cut it out entirely (and switch to tea), but after giving my stomach a rest, it is okay again. Some of that also has to do with the quality of coffee. Some blends are smoother than others. If I'm drinking a lot of cheap coffee (like the stuff you get at the gas station), or really strong, burnt tasting stuff (like Starbucks regular coffee...or a few other "gourmet" blends that aren't made right), that'll usually do it.
When/if I have kids, I'm telling them to never start drinking coffee. It's a horrible addiction when you sit here saying, "Yep, it makes my stomach really sick, but I still want more!"