You have to give it some time. At the beginning it is as you say, but then the skin and the hair find their balance. Wait at least a month, if you can wait that long.
If you have long hair I say using oil on them is really very important for their beauty. For one day they might look a bit greasy, just make a pony-tail or whatever that day, or just a scarf hiding the roots is enough, the day after they are brilliant and they smell faboulous. You can also consider vinegar rinsing, it makes hair shiny and strong. With long hair it is double important not to deplete them. This is what I think.