YES! Right around my second cycle post-mirena I developed a "burning stomach" sensation every time I ate, nausea, and even worse - HEARTBURN and REFLUX - which I have never, ever experienced before. They are awful. I'm close to when my third cycle should start and am hoping that things get back to normal shortly.
Just in case I am getting tested for new food allergies later this week. One of my weirder side effects from Mirena has been crazy food intolerances and IBS -- when pre-Mirena I always had a cast-iron stomach.
Gahh! Sometimes this whole thing makes me so frustrated I could spit.