HELP?!?!

Holly • October 7th 2018 I had my first ever orgasm

Okay so idk what to do but.... I just finished my last pack of birth control pills, I'm now on my period, will my period end in 7 days like normal or will I have to get new birth control to stop the flow??? Because I'm going to Mexico in three days and I should be done my period tmrw, but idk if it will work or not please help!!!