Eggwhite cervical mucus is clear, like raw eggwhite, not white like cottage cheese. It's said that it is so clear you can read a newspaper through it, and it holds together so well that it can be snipped with scissors. It sounded more like you were describing the cottage-cheese look of a yeast infection.
It also could be your ovulating and it is your egg white cervical mucous and his sperm mixed together. I have had this before and since I track when I ovulate I know what it is.
If it is a yeast infection it will smell bad and you will be extremely itchy.
Does sound like a yeast infection. There are over-the-counter preparations to treat yeast, or you can go see your ob-gyn (which would be my preference in this situation). I don't know if your partner needs to be treated too.
That sounds like a yeast infection