Either Wednesday, May 4,2016 or Thursday, May 5, 2016, I had unprotected sex with my boyfriend. We used the "pull out" method and yes I am aware that you can still conceive from this method. On Friday, May 6, 2016, I got my menstrual cycle and it lasted until Wednesday, May 11, 2016. On Monday, May 16, 2016, we had sex again, but this time with a condom. Afterwards, I started spotting and I still am, but it is very light though. I just want to know if this could be implantation bleeding from the unprotected encounter or could it just have come from the deep penetration from the encounter on Monday? Someone please respond.