Dear Madam, Please do not take antibiotics or antimicrobials without consultation with a doctor. These may cause more harm than good. It is always best to restrict the use of any medicines during the time when someone is planning to conceive unless they are absolutely sure that they really need them and that these are harmless. As for the use of Ofloxacin during pregnancy, its comes under FDA Pregnancy Category C - Risk cannot be ruled out. ornidazole and metronidazole too are better avoided during the first trimester of pregnancy. Please try to avoid medications if you do happen to get pregnant as much as possible especially in the first three months.

Flatulence can be caused by progesterone and even metronidazole with even metallic taste in the mouth and it is better not to take metronidazole after 10th day of Menses , try regular intake of nonspicy Food and walk around for some time after eating  --Dr Junamoni