Possible pregnancy

My husband and I really want kids but haven't had the talk yet as to when. I'm on birth control, but I forget once in a while to take one or two in a row, here and there. I forgot to take two the week after my "fertile week" (according to glow) and now I'm spotting. Normally if I miss two or three I actually get my period. This time it's just spotting, and it's barely there. It's been going on for 4 days now. I know it's possible to get pregnant while on the pill if you don't take it right, but I'm trying really hard not to jump to conclusions. What do you guys think? Is a week too soon for a baby sign?? Or is it from missing pills?