Try taking one antibiotic out of the regime for a few days and see if anything changes. If so, there is the answer. If not, try it with the second medication (probably for a week, not just a few days-on both of them). If you find that it is one of them giving you a problem, you really need to go back to your doctor. There are always alternatives to the medications the Rx.
Julie (wife to Mark 24 w/CF)