Natural oily hair?

So

So I used to get highlights in my hair every few months and I had this dirty blonde thing going on for a good amount of years. Earlier this year I stopped coloring my hair and I'm finally at a point where I've grown out/cut off all the color and it's just all natural up there.

Love how soft and shiny it looks now but I've also noticed that my hair gets oily more quickly. I used to be able to go a full week without washing my hair and it looked completely fine but now it starts looking rough after two or three days. I guess it's because my hair isn't so dried out all the time anymore from the highlighting? Idk but I'm missing the old days. Anyone else have a similar experience?