I have been having that for a few weeks now, and had my 1st ob appt last week. She said it was normal, I had no signs of infection. I have also read as this being one of the symptoms of pg, unless of course it is accompanied by itching, or other symptoms. You can call your OB just to double check.
Re: Yellowish discharge?
Are you taking Progesterone suppositories? If so, this is normal.
But as always, call your doc for any concerns and to get the most accurate information/diagnosis. That's what they are there for!