Sounds like it, is it itchy too?
I always get a yeast infection around the 12 week mark and then again around 16 week mark. I get the 6 day treatments of Canesten cream. Mention it to your doc though.
Discharge is common during pregnancy, just mention it to your doctor at your next appointment. Unless it's brown or pink then you should check with them sooner.
As for yeast infection, that's also common, along with UTI. I had to get treated for both around 18wks. Not a big deal and it's not harmful to the baby. Relax. Just check with your doc and have they run a test.