There is a chance you can be pregnant while using birth control
but it's very, very slim as long as it didn't break, there were no
holes, and it was used properly. I'm sure you'll be just fine! Don't stress over it, because that can delay your period. Maybe think about going to a free clinic and getting some pills or a different back up method of birth control as well as condoms so you don't have to worry, good luck!