Cream order. Or serum over metrogyl gel.

Hi I HV done 4 chemical peel and 3 fraction laser for my pimples n scars purpose so after laser since last 4 5 months my skin becomes red and scars looks v visible. I m using aderma face wash and eeythego gel and rivella sunscreen in day time to control redness as prescribed by my dermatologist but still it becomes red after 4 hours if application of red so she recommended me to apply erythego twice in day Tyme and for night purpose she has prescribed me roseliane cream on alternate days for redness and recently she told me to at night to use vitamin k serum and metrogyl gel for redness controlling and improving skin and red circles but I forgotten what order should I apply the serum n metrogyl gel.should I apply metrogyl gyl over serum at night or serum over metrogyl gel. I m confused is order of applying matters I usually wait 10min after applying one cream but at what order should I apply serum n gel at night thanks!!