My discharge is white, clumpy, and tart tasting ( my boyfriend says ). I have no odor or itchiness.

Maybe go see your gynecologist. That is some of the symptoms of a yeast infection, but not all and not some of the important ones. It could just be a slight change in discharge, could be something more.

Either go to your local sexual health clinic they have walk-in times.

Or go and see your GP who will be able to refer you to a gyno if it is serious, although its probably something minor.