Help me please

So I’m 27 weeks pregnant and since the start of my pregnancy my hair has been uncontrollably greasy to where sometimes even after I wash it it is still greasy when it  dries. My hair looks absolutely horrible and I cannot take the grease anymore does anyone has any suggestions on how to help this? I’ve tried 6-8 different shampoos, I tried washing my hair everyday and not use conditioner, I’ve tried washing it every other day, etc.. nothing is helping!