Foods tasting differently?

First of all, Happy Thanksgiving! Thankful to be having a little one arriving in July! Secondly, has anyone had their tastes change during pregnancy?? There have been a few foods I've always had and then tried to eat, thinking they tasted "weird" or off.(it was meatballs) This morning I'm making cookies and only need the egg yolks. So, I used the whites to make myself breakfast....they tasted "fishy" to me!! I made DH taste them and he said they were fine. Is this normal? Lol