I've had discharge through out my entire pregnancy. I'm 29 weeks now. My doctor has never been worried about it so I think it's normal. It's not pleasant though. So if it persists I'd recommend getting pantie liners.
I started getting that around 9 or 10 weeks, and I still have it at 22 weeks...completely normal according to my OB and the books I have read. If it is bothersome, use a panty liner or keep some feminine wipes with you...Always has some nice individually packaged ones to stash in you purse. It will help you feel better:-)
I'm 10 weeks as well and I notice I have a thicker type of discharge as well. Nothing that would indicate a yeast infection but just a different type then usual