Accutane: 20mg Twice a Week As Opposed to 20mg a Day?

Hello I was prescribed accutane at 20mg a day. I had bad side effects and was generally very scared. I stopped and now considering trying 20mg every three days? Haven't had the chance to talk to my derm yet but would like some other opinions. My acne is mild but flares up occasionally. I have blackheads that won't go away. Would love clear skin but can't handle the side effects being so prominent - I can literally feel my body reacting badly, i had a lot of pain when I moved. Thanks!