Don't want my periods during exams!

I'm taking my DATs for dental school on 5-28. As this is a very important exam, I don't want my period full of unbearable cramps,etc. during this week. Despite knowing how BCP works(estrogen, proges.,LH, FSH),I would like a 2nd opinion as to when I should start my triphasic pack (I haven't been on BCP since 1-11). My LMP was 3/23-30 & I would like to know if I should: A) have my period normally this month (may or may not be on 23rd) & start the 1st pill the 1st day of my period ("normal" & therefore futile unless I start before 4-21) or B) start pills this Sunday, 4-10, which I should then have my period during the 1st week of May (>21 days later during placebo sugar pills) or C) start Sunday, 4-10, & instead of taking the placebo pills, I just start immediately on the 2nd pack (5-1) & then skip placebo pills for the 2nd pack & start on the 3rd pack on 5-22? I'm opting for B)but any feedback/corrections/advice would be greatly appreciated. I do apologize for the long post. Thanks!