What to watch for re: yeast?

[Minette]

I've seen many mentions of yeast in this forum, but am unclear on what that really means. My 7yo DD (pandas suspected but not diagnosed) finished her 10-day course of amox about a week ago, with no noticeable improvement in her anxiety, but also no increased problems with anything else. I had her on a probiotic that whole time and still continuing, though I don't know if it's the "best" one (she is incredibly finicky and I had to pick one I thought she would actually consume).

 

She does eat a lot of sugar, mostly in the form of food (not soda or total junk) but still sugar. I know it's not great, but we're grateful for anything we can get into her, and we do bribe her with dessert. Does that have a connection with yeast?

 

We have an appt with Dr. Melamed (immunologist -- recommended here) in Denver in two weeks, and I'm trying to sit tight and not attempt too many wholesale changes until we know more. Although her anxiety is a problem, it's not disabling (usually) and she is even happy a lot of the time. But I am curious about this yeast thing. If yeast were a problem, how would I know?