need advice- darker around my private

So before pregnancy my vagina lips and around my inner thighs by my privates were the same color of my skin. After my child and now as I'm getting older. I'm only 25. Around my inner thighs and lips have gotten a darker color. Even my arm pits and buthole 😬😬Have y'all used any kind of treatments to make the skin lighter... I've been with the same guy for five years and to embarrassed to have sex with the lights now that it's been getting worse!! Help!!