My period is 4 days late. I just finished my antibiotics for a severe rash I was taking 2 times a day. And I now have a yeast infection. That I'll be taking more medication for. I last had sex last Wednesday. My period was to come early this week. Could I be late from medication and stress. (I stopped the birth control in August) I'm flipping out. I'm in college and don't want any babies rn.