How long does implantation bleeding last.

Kimberly

I’ve been spotting for the past 3 days. The color is starting to turn brownish. I have seen no blood clots at all. Sometime when I wipe theirs no blood at all. Ive been told at the hospital it’s could be implantation bleed but to keep an eye on it when I went Monday. And I’m still have some bleeding it’s not enough to wear a pad or anything. It was pink and now it turning brown. I just want to make sure it’s normal