Implantation bleeding?

Victoria
About every 3rd time I pee today when I wipe I see a very light pink blood. I've been cramping the past 2 days but stopped this morning in my mid left abdominal area, I have had diarrhea all day and my right nipple has felt like someone is stabbing it. Does this sound like pregnancy or what? Me and hubby have had sex the past 4 days (ovulation week) and my period isn't due till the 30th. Any advice is greatly appreciated!!