I am only 16, and i've never had a child.
But....I have had an yeast infection. I myself got itchy down there too. And it was red. It was almost like a rash like content. It hurt just a little bit too.
Another way to tell, is if your discharging oddly(funky smell, really creamy, etc) . That's always a sign.
But yes, monistat (i think I spelt that right), helped a whole load! It releived the pain.
Hope everything goes right for ya!