Changing my cycle

Lauren
So I'm currently on my period which ends in four days.
I'm
Doing a fitness completion where I'm going to wear a bikini and be judged on my body so I really can't be on my period next month for this as I'll be bloated and holding onto extra weight but I'm due to be on it!!! Basically I need to be on the
Week of my cycle where your
Hormones are
Completely normal I'm not even sure what this week is. 
But basically I also can't just take the pill to stop my period as this can also cause you to hold on to weight and I need my eostrogen levels to be as low as possible. 
Does anyone have any ideas or know
If it's possible for me to like have my period take the pill for a week or so then stop and have another this month and delay June's is that possible ???? 
L