Hi Donna,
Welcome to Healing Well! I know this sounds cliche especially when first diagnosed but try not to stress out. Stress makes all autoimmune diseases worse.
Did they take you off the Lipitor? It is not a friend to a liver. They should find a different cholesterol lowering medication for you. Also, you mentioned having psoriatic skin problems before. Do you have psoriasis? If you do, you may be having a flare of that which is coinciding with your AIH flare.
Being on pred you should try to get up and walk during the day. That may also help your legs. When you see the hepatologist, he'll likely put you on an immunosuppressant as well as the pred. This will be needed to help you start weaning off the pred. If you have psoriasis, it may help with that too. Did the biopsy say anything about cirrhosis? You said the CT scan showed minor scarring...the biopsy would have confirmed any suspicions.
Also, they may prescribe a diuretic to help with water retention that the pred will cause. Pred also causes thinning of the skin. Obviously, you'll be bringing up what's happening with your legs to the hepatologist. It would be best to write down some questions in a notebook and bring it with you to your appointment. You can write the answers he/she gives you right there so you don't forget. It may also be helpful to bring someone with you for an extra set of ears. Definitely start documenting any weird symptoms or feelings so you can let the hep doc know.
Fatigue goes along with liver disease. However, your pred will soon kick in full force and you may notice some extra "energy". It is an excitability that the pred causes. That in turn causes insomnia and mood swings extraordinaire! You'll be able to speak to your hep doc if/when this happens. They can prescribe some sleep aids to help with that for while you are on the higher doses. There's weight gain and moon face and acne...and a bunch of others. You may or may not get them. You can search my old posts for my experiences with them. The side effects usually go away by the time you get to 10mg pred.
I'll write more later and please ask ANY questions, no matter how odd you think they are