Can vaginal thrush delay your period and can it be a sign of pregnancy? 7th day of treatment and still signs of it! help!

Yeast infections: Yeast infections are not a cause of irregular menstrual cycles nor are yeast infections a sign of pregnancy. If you think you might be pregnant check then check a home pregnancy test. They are cheap, reliable and available at any pharmacy. If your yeast infections is not going away with treatment you will need to schedule a follow up visit for testing.