Stomach bloating and Anxiety. Dangerous?

After I take meals my stomach will bloat and lot of gas forms inside my stomach. Unless that gas come out of stomach I feel extreme bloating and anxiety. After eating I will lay on my back keeping upper body portion in elevated posture and within 10 - 20 minute all gas will come as burping nearly 6 - 15 times . After this I feel comfort in stomach. I also have stick stools . If I take Zenflox -oz as suggested by Doctor I feel everything normal. But once I stop medicine after a week the same problem repeats. This is been continuing from last 2 years. I have taken nearly 6 -10 dosages with 3 day course at different intervals of 2 years. If I take 1 tablet of zenflox-oz once or twice a week I feel better. Dear Doctor is taking antibiotics for long time is dangerous ?? Is the continuous daily intake for 1 to 14 days is considered dangerous OR Even taking Zenfloax-oz 1 tablet once or twice a week is also dangerous please Reply......