extreamly dry face skin

[yas81]

Hi
i am 28 years old female Caucasian,i had a bad acne in my early twenties,it was only on my cheeks,it lasted for almost two years,then it started to disappear without any treatment,my problem is since that time my skin became extremely dry and itchy on that Area that time but now my whole face is so dry and nothing worked with it,i saw a dermatologist he diagnosed me with seborrhea i don't remember its like (kind of harmless bacteria lives on my skin feeds from my skin's oil) that why the moisturizers doesn't work he gave me cortisone cream it did work for very short time and i stopped using it,now i saw another dermatologist she didn't agree that i have seborrhea but i do have rosacea and what caused my dry skin is small tiny acne it can be treated by differin cream,if you look very close to my skin you can see very small white dots but it doesn't looks like  an acne and my skin look good when you see it but if you touch it you will notice how dry it is,I'm so confused can you help