I Have Been Taking 500 Mg Of Metronidazole 3 X's

I have been taking 500 mg of Metronidazole 3 x's a day and 500 mg of Ciprofloxacin 2 x's a day..............for stomach lining inflammation...............started on 2/23/16

Stomach is PAINFUL and most of the day so sore and gets Puffed Up.........I am suppose to take a Metronidazole in two more hours..............don't know if I can swallow one more antibiotic......

Was told by doctor right at the beginning "it would get worse before it gets better"...........but the pain is terrible.

advice please........