My gyno prescribed metronidazole for bv. a few days into my dosage, i started experiencing uti-like symptoms such as frequent urination and an increased feeling of needing to urinate. can the meds cause this and does this stop when i finish the meds?

Metronidazole doesn't generally cause such side effects. Best to check with your doctor, and perhaps (at her discretion) to have a urinalysis and culture to check on UTI possibility -- especially if you've had UTIs previously and the symptoms are the same. (MTZ is not effective against most UTI bacteria, so it is possible to develop UTI while taking it.)