How long did your implantation bleeding last?

I started bleeding lightly, pinkish reddish brownish non consistent 6 days before AF. It continued until the day it was due for 7days. Towards the end it tapered into brown and finally went away. Period did not show yet and also feeling nausea and slight cramps and backache and am super emotional. Tested day AF was due and BFN waiting until tomorrow to test again. But for now I'm just curious as to how long your IB bleeding lasted! Thanks ladies and wish me luck!