Pregnant or just spotting?

So I was a couple of hours late on taking my birth control and later that day I started spotting. I’ve been spotting for 2 days now. I had sex when I was ovulating but the pull out method was used. Do you think it could be implantation bleeding or just me spotting from being late on the pill. I’ve been stressed as well lately because my mom just passed away so I’m trying to figure out if its implantation or not. I’m not cramping or anything but having normal boob pain because I’m supposed to start any day now. Please help me out I’m stressing!!!