Oily hair help???

So I have really oily hair. If I go 3 days without washing it, I look like I fell head first into a grease factory. I like wearing my hair down but it’s difficult. If I wash my hair every day, it’s greasy. (Makes no sense to me, usually it dries peoples hair out washing it every day). And if I wash it every other day, the middle day I’m stuck looking like a grease ball. Help me please. I don’t condition my hair because I have naturally really smooth/soft hair so it’s not excessive conditioner use. I really need help on this one ladies, I look like an egg when I wear my hair up.