Hi. I Am Currently On The Implanon Birth Contol Since

Hi.
I am currently on the implanon birth contol since last July and I had sex for the first time in february. He was wearing a condom and I have that contraceptive bar in my arm. I have not gotten my period yet and I should be due it. I'm so worried that I could be pregnant but I know it's practically impossible wit the condom and my form of contraception. Could it just be the implanon that is causing irregularities all of a sudden?

Thank you