I don't understand....

My boyfriend and I have been tic for a year and 3 months now and no luck, so this past month I decided maybe if we have sex everyday that we would for sure get pregnant by not missing my ovulation as I don't know what I ovulate because I show no symptoms well on the 28th of November I start spotting 8 days before my period is due so I thought well maybe, now I'm full on period with A LOL of pain I don't feel right and my body just doesn't know how to act....a friend told me she got pregnant with both of her children while having sex on her period....how many of you got pregnant while having sex on your period? Why would mine be 8 days early, and when should I just give up hope?