If you're not taking the medication properly it could cause the upset stomach. Are you drinking alcohol? Another things is that u should always take the medication with food or milk. I'm taking the same exact medication and am not experiencing any symptoms beside darkened urine which is commom. Good luck!
The pill that says Pliva 334 is metronidazole. That's for the bv. The miconazole is an antifungal for yeast. Did you have a yeast infection too?
If you think you are pregnant, or there is a possibility, you need to get tested and call your doctor first thing to ask about taking these meds with pregnancy.
Cramping is a common side effect, but extreme pain isn't. Follow up with your doctor first thing.
Aj