Help please ladies

my last period was March 17th, still no Af. the past 2 weeks I've gotten a bad yeast infection (tmi sorry) I used generic monistat to clear it up. Can either of those cause a late period? I am going to make a drs appointment in the morning, but until then I was wondering what you ladies thought. I have been feeling like AF was on her way (cramping, sore breasts, backache) since before I got the infection. I'm sorry this is so long! Has anyone experienced this while ttc and got your bfp? ?? Please share your story's! :) thank you