On my face is a slightly whiter patch of skin. it doesn't change color when getting tan or burned. is this normal?

Hypopigmenation: Most likely you have hypopigmentation a decrease in melanocytes in the are that release melanin which tans skin. This may ne naturel or secondary to a trauma, burn infection you had in the area. It is not dangerous but if the melanocytes are not present or were killed then the patch could be lifelong

Tinea versicolor?: Tinea versicolor is a harmless superficial fungal infection of the skin. It can diminish tanning (in light-skinned people). It is flat, non-itchy. Over the counter medicine used for athlete's foot can cure tinea versicolor, but relapses months or years later are common.