Are probiotics effective for vaginitis, which is called the "cold of women"?

I heard that vaginitis is so common that it is called the "common cold" for women, meaning anyone can easily catch it.
I also think I might have developed a vaginal infection recently, as it smells.

I see a lot of probiotics for vaginitis on the market these days. Will taking them consistently be effective?
I'm also having trouble deciding which product to buy.