Brown discharge

So I know brown discharge isn’t that uncommon. It’s just leftover blood from your period that oxidized but I should be about 2-3 days post period now and I’m still having to wear a liner due to this brown discharge. Its very dark, almost black and I don’t want to say I’m itchy inside my vagina but kind of? If that makes sense. I checked around to see if I had left a tampon or anything and I’m all good. And it’s not painful or anything. And like I said it’s not like ITCHY, but I notice it feels just a little off. This is new to me. So not sure how long until it passes, or if I should be worried about a yeast infection? Thoughts?