Hello, I would be happy to help you with your question.
Yes, if you missed pills during the pill pack, then the birth control effect is definitely lessened. It is important for you to know if you are pregnant or not. You can certainly go to a clinic like a Planned Parenthood (if you are in the US) to get a pregnancy
test. Otherwise, you should talk with your partner and he should be responsible for helping to pay for a test.
I hope that this helps and good luck!