well i been diagnosed with trichomonas vaginalis and the doctor gave me 2 grams of metronidazole as a single dose and a vaginal cream called clotrimazole (3 days). but since i used the metronidazole i had dark urine, i had and upset stomach i couldn't eat or drink anything because i will throw up. it's been 2 day and i don't have the upset stomach but i still have the dark urine how long is it gonna take before the dark uring goes away?