idk maybe I'm just overthinking this but.....

I was on the birth control shot for one three month period and had unprotected sex. About five days before it expired we started using condoms again except for one time when the shot should have still been active , but he pulled out. My shot became inactive on the 4th of June I've been using condoms but I'm still worried i might be pregnant. I haven't had a normal cycle on the shot and I still haven't started