Need help! Implantation bleeding or AF??

So a couple days ago I got excited because I went to the bathroom in the morning and when I wiped it was a little pink. Fast forward a couple days and I've had two days of brown discharge and now I woke up this morning and I'm bleeding a little when I go to the bathroom. Mainly when I wipe. I'm 9dpo and AF comes in 5 days. Is this AF or IB??