I also have ADHD, and worse still, I'm all out of medication until mid-September.
The reality is we have to be in control of our lives despite our condition. If you can't remember things, write them down. If you have a hard time focusing, try to remove distractions from your environment. If your day is unstructured, plan tomorrow out tonight. If you are constantly awake at 3am, set your bedtime earlier and use whatever tools you need to make sure you are asleep at 10pm.
I'm convinced there's just no other way to handle life. The world won't wait for us to be ready, so we have to ready ourselves. It's unfair, but that's life.