Bleeding!!

So I’m due my period in two weeks. Me and my partner have been having unprotected sex for the last two/three weeks. I woke up this morning and there was a light brown blood when I wiped, never had this before and it said I was ovulating on my app yesterday and day before. I’m also getting back cramps. Done two pregnancy test and both are negative, is that as it may be too early? My dog is also super needy with me and loves to lie on my belly. NEVER like this.. help..