Hello,
I cannot confirm anything without examination but it might be due to chloasma of pregnancy.It is a tan or dark facial
skin discoloration. Although it can affect anyone, melasma is particularly common in women, especially pregnant women and those who are taking oral or patch contraceptives or hormone replacement therapy (HRT).
The treatment includes various skin creams like hydroquinone, azelaic acid, corticosteroids, tretinoin cream and laser treatment.