pregnancy

I'm new to this app but I was wondering what my chances are of being pregnant. I have the depo shot and it should be due between February 18th and March I'm not sure what my doctor said, I had my last period in January which they are irregular because of the shot, I did have unprotected sex (but did have the shot ) but he always pulled out and we started using condoms in February. There was 2-3 times without condoms the last 2 weeks but always pulled out. I will be testing this week in case because I have had a few symptoms and don't know if it's pregnancy or other issues so just wanted everyone's opinion. Thanks :)