Warm water with salt should ease the itchiness short term, as for cream,I think doctor prescription are better than anything you could buy over counter, failing that, when I had and itchy lady part, I used vagisil (washed with warm water with salt first) and resist ( I know it's difficult to) itch.
Flora is out of balance. Sugar feeds thrush so you need to stop sugar and processed carby foods. Eat vegetables an healthy protein. There is an oral pill called Diflucan that you could take - one dose or two is all they give you, but it can be hard on your liver so take steps to get rid of the yeast overgrowth once and for all. Wash towels, underwear and socks in hot water and detergent with about 1/2 cup of baking soda each load. Dry thoroughly.
You can look into using probiotics, tea tree oil topically, cranberries (but not sugar) Coconut oil, nigella sativa, garlic ... many natural healthy herbs discourage yeast