Am i pregnant?

Ok, so this is really TMI probably but basically my boyfriend and i can’t have sex because it just doesn’t fit but sometimes we try to and it doesn’t work anyways. And he didn’t even finish on or near that area, but it’s been two weeks since that happened and I’m having brown spotting and i’m really worried that it’s implantation bleeding. I don’t have a regular period since i stopped taking my birth control a few months ago, so I don’t know what’s happening. Is there any chance at all i’m pregnant? I’m technically a virgin in the sense that nothing has gone inside me, cause nothing fits, so the chance i’m pregnant is really small right? google isn’t helpful because it just says THERE’S ALWAYS A CHANCE and it just stresses me out more. I’m a freshman in college and i can’t afford an abortion right now so I don’t know what to do if I am.