Gastro intestinal problems!?!?

Does anyone here have any gastro problems? I have an appointment in February with a GI specialist. I have extreme bloating all the time, lower backaches most of the time, nausea and acid reflux, fogginess - and it's all so frustrating! I don't even know if the issue has to do with gastro, maybe it's gyn stuff. I've tried to change my diet, but I don't know what to change it to, I just hope they figure it out!! What issues do you ladies have and how do you deal with them?? Have you had similar symptoms?