Am I pregnant?!

So I am on Depo and me being me i am one of those, it can happen but it wont happen to me kinda people. So me and my boyfriend had sex a few times last sunday and my period was supposed to start 2 days ago. Granted I am on Depo and its been told to mess with ur body and period and stuff like that. Im just not ready for a child right now but Im very against abortions. Idk if im pregnant or not but i am kind of stressing about it. Is there a different way to test if im pregnant besides a test because other people in my life would flip the fuck out if they found the test. Can anyone help me or have any advice???