I've always been on time with my period all my life maybe one day early or a day late, but it's always about 28 days exactly. I did have an accident which right away I took the plan b within 10 hours of unprotected sex (also got tested for sti). I did get my period eventually a whole week early. Ever since then I started my birth control pills but it has delayed my period, is this normal? Also getting thicker white mucusy discharge. Is this normal?