my hair needs help. it used to have body and a little wave before pregnancy. now at 21 months PP all my old hair is grown out and it is super straight and flat. I don't know how to make it look good anymore, even when I can put in the time! I've had some success with dry shampoo but feel like I could do better.

any product advice or tips? I prefer not to spend a ton, but might for something amazing. especially if it lasted a couple days, I don't wash every day.