What will happen if I stop using Accutane all of a sudden? Without the advice of my doctor? (Photo)

I've been using Accutane for almost 4 months, the dosage that I used now very MWF 40mg and the rest was 30mg but it seems like my acne has no improvement though some of those healed but the redness was still there and it's still growing more acne. My doctor advised me to take Diane-35 for 3 months as well with my Accutane but it seems like the same..I also tried to used Conzace multivitamins because it has vit.e and zinc and still there's no improvement.. what should I do?