I'm 6dpo today and my hubby and I just bd. When I went to bathroom and wiped there were a few brown…

I'm 6dpo today and my hubby and I just bd. When I went to bathroom and wiped there were a few brown spots on paper! Could this be implantation bleeding? I've been feeling crampy and have some breast pain. I did not have implantation bleeding with my last child and my AF isn't due until 12/14. I also do not spot before my period.