Mixed emotions

I’ve been off birth control for a year now and my boyfriend and I have not used any form of protection and I still have not become pregnant. I’m starting to worry a little bit more now because I just don’t understand why it’s not happening for us. We aren’t actively trying but we are also not actively avoiding trying to get pregnant just kinda going with the flow and if it happens it happens..just hasn’t happened yet :-( every time my period comes around I get super depressed. I guess I just needed to vent a little bit because I am only 23 and it’s crazy for me to be feeling sad about not getting pregnant when everyone my age is avoiding that situation lol