Acne scars. They are worrying me a lot!

3month back I suffered from severe acne ..I consulted skin doctor she suggested me to undergo dermaroller and chemical peel .I underwent dermaroller followed by chemical peel and she gave me isotretinoin (10mg) for 20days after using that my face became more worsen ..I asked her y my face becoming like this she told that due to the usage of isotretinoin ..again she suggested me 2 sitting (dermaroller +chemicalpeel)....even though there is no change...again my skin is breakingout ..i went to depression....after a month my skin has so many scars i think there are due dermaroller because before the treatment I didn't had any scar ....i asked her she game salicyclic 3% lotion now i am using it ...my problem is how to get of rid of scars and spots they are worrying me a lot