My period started on 3rd of March, 35 days after the previous period. On 7th of March, I had slight intercourse but no sperm. I took ipill within 24 hrs.After 5 days on 13th of March, I had little red blood flow..Now it is 6th of April and no period. What to do? I am very tense. Should I count my cycle from 13th of March?