How long is my pink eye going to last?

I went to my aunts over spring break and got it. When I finally got back I put eye drops and stuff it got better, then it got worse. And I have school. I got my medicine yesterday which are some Falcon eyedrops? And I just wanna get back to school because I have CST testing next week and I HAVE TO BE THERE! How long till I can go back to school?