I gave birth to a baby by normal delivery. My belly is still like I am six months pregnant and it becomes dark in color?

I gave birth to a baby by normal delivery in May 2016.. My belly is still like I am six months pregnant and it bcums dark in color like black. Wil my belly reduce n Wil turn white again? I have lot of stretch marks also. Wil they disappear? Kindly helP. Everyone says I did itching on my belly during pregnancy so marks n loose tummy Wil never go. Plz guide me. I am really worried

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