Hello I'm Worried About My Belly Button, Last Night It

Hello I'm worried about my belly button, last night It kind of ached and I thought nothing of it because it's happened before, but around 12 noon the next day my belly button was full of flakey crusty brownish red stuff and I have no idea what it is. I tried googling it but no one talking about it has had the same type of experience, I'm really worried...