Can I Use 0.1% Pure Retinol ,and a Vitamin C Serum After Month of Fraxel Laser?

HI i had my first fraxel laser a month ago,my skin is nearly back to normal,with a little redness on my cheeks and i just wanna ask you if i can use 0.1% of retinol and a vitamin c ascorbic acid! i'm just really scared of my sensitivity and redness! i will do my second fraxel in 40 days! can i use this two ingredients with sun protection spf 50 all the time?please tell me if my redness will increase or i will actually improve my collagen? thanks a lot