Greasy hair?

Heather

Okay, maybe I'm losing it, but my hair seems soooo greasy all the time. I'm about 7 and a half weeks with my first baby. My hair has always been fine, but the past few days, it's greasy and oily no matter what I do. Is this a pregnancy thing? Dry shampoo has never worked for me in the past but maybe I should try again. This is embarrassing! I know it looks awful!