Greasy hair when pregnant?!! 😩

I know it's not my shampoo or conditioner, and it's also not the amount I'm using because I even changed that to a smaller amount than I normally was using. It started happening the past couple weeks now so the only thing I could think of is that it's coming from this pregnancy?? If you had this problem what did you do to help? I've tried dry shampoo but I'm running out of it so fast, so I tried baby powder and that just causes a build up on your scalp. 😞