Went to the doctor week and half ago for flu and found out that i...

Went to the doctor week and half ago for flu and found out that i had ear infection and bronchitis also.. Dr. prescribed omnicef this time.. (300mg - two pills once a day) and i took the 10 day course.. infection somewhat cleared.. but i had tremendous stomach cramps and loose stools, gas, bloating, etc.. I thought that those effects might have been part of my flu... and after being off the antibiotic for 3-4 days, they started to go away.. so.. went to the doctor two days ago and she wanted me to do another 10 day course of the omnicef to finish clearing up my ear infection and bronchitis.. the same night i started this course.. (last night).. i immediately had the stomach cramps, gas, etc.. all over again.. i am convinced it is this antibiotic and will be calling the doc in the morning.. i AM NOT taking any more of this stuff.. the side effects are debilitating