“Vaginal Bleeding from antibiotics ”

At the beginning of June I got a UTI and I was prescribed Bactrum. It took care of the infection but left me with a yeast infection. Once I got the yeast infection taken care of. I had a wisdom tooth extracted. The dentist prescribed me 250mg of metronidazole and 500mg of amoxicillin for a slight infection. After 2 days I noticed vaginal bleeding. I stopped taking the medication after seeing the blood about 3 days ago, but I'm still bleeding. It's not heavy. But I'm just concerned as to when it will stop. Is this normal? Will I stop bleeding soon?