Implantation or period?!

Have had sore breasts since Aug 15th (peak ovulation between 14-16 according to glow) and I'm due for my period in two days but after having normal intercourse with hubby today we noticed while changing positions that there was brownish blood on him... wearing a pad incase period is just early.. but I've never been early?! We have been trying to conceive and had sex every day for my ovulation period.. not sure what to think. . Do I wait 2 days to see ? Ugh...