Pregnacy help

So today is my period day and I don’t feel like I’m about to start my period which is kind of upsetting. I’m 16 and I’m worried I’m pregnant. I have sex on the 10th day which is known as a fertile day. We used protection and he did pull out with protection. I have no pregnancy symptoms thankfully. What are my chances of being pregnant if we used to condom correctly but on my fertile days. I have been stressed could that be a cause.