Stop period for exam😣😣😣

Pleaaasee answeeerrr😥😥😥😞😞😞

A real quick question!

eve says my period starts in seven days and it's accurate most of the times...

But last month my period started four days sooner...

So I have an important exam this thursday and I am soooo stressed😥

And every time I get cramps about 5 days before my period actually hits...

I got all worried out and took a birth control pill the other night...( 2 till now)

Will it stop my period till friday?

Or I took it so late...

Bc Im stiill feeling minor cramps😩