I think it is different for everyone. You have been doing so well for so long, I doubt you're going into a flare. I think you're getting yourself nervous and the stress is contributing to your symptoms. Try to take it easy, relax and increase the enemas. You will be fine!
Are you having frequency? I think a mild flare is usually accompanied by 2+ BMs a day, probably more like 3+. Most likely they would be on the soft side.