Metronidazole cause late period??

So i was diagnosed with bv for which i was given metronidazole 500 mg tab im almost done taken it and im 3 days late which my cycle is pretty normal maybe 1 day late is the most ive ever been late but not 3 goin on 4. Yes ive taken 3 cheap dollar tree test pink dye ones all negative. Just wanted to see if anyone ever experienced this and ended up being pregnant or not.