I'm going crazy!

I had some light spotting on the 20th and the 21st and then the 22nd i didnt bleed and havent had any bleeding today ither. it was light red and pinkish and on the 21st it ended in pinkesh brown like old blood. i keep reading about implantation bleeding but i dont know what to think because sometimes i spot before my period but i dont have that kind of spotting untill a day before my period.but its only pink when i wipe and it isnt enough to fall on a liner. and ill add that the past two days iv taken a ahpt and it has been negitive