PERIOD MISSING BUT NOT PREGO?! HELPPPPPPP

It’s been one month and four days since my last period. This is not normal. I have taken one pregnancy test already and it said no. But during my last period I was taking prescribed medication for a yeast infection and b.v. I also took my yeast pill and b.v. On the same day...then cont with just the b.v. pills as directed but at off and weird times (struggling college student). Then at the end of those I took the one yeast pill left and got a script for one more yeast pill since the very first did not work. I am wondering did this mess with my cycle? Also there has been an abrupt change in weather where I am so that could be a reason...in my head atleast. Anyways, Any and all advice welcome. Peace & Love -D