Odd Mucus Discharge?

Mallory
I am a 17 year old female. I am somewhat active, I eat right for the most part, and I am on multivitamins. I am sexually active.
​**If it helps with the answers I have had one pregnancy which did not carry full term, and a miscarriage on January**
​Since December 2013 I have had an odd discharge. I have been to the doctor who has run tests but found nothing abnormal, but I've seen no changes.
​What I am experiencing is an odd doscharge from inside my vagina. It is a light brown in color and yeasty in texture (if you've ever made bread from scratch you'll know what I mean). It carries a light odor, but it is not out of the ordinary. Do you have any idea what it could be?