Hi, Suzie! I also wanted to welcome you to the forum. I had never heard of that type of hepatitis, either, but learned a bit in a Google search. As PG said, all liver diseases have certain things in common, so you should feel right at home here. It's a very supportive group.
My goodness! I thought that was a typo! I'm glad to hear that you are gaining appetite and some weight! It is just not healthy to be that thin and would also sap your energy. Glad to hear the oxygen is helping, but until you stop smoking you will still have lung problems. I stopped 7 1/2 yrs. ago, and I was a 2-pk. a day smoker for 40 yrs. Best thing I ever did, next to quitting drinking and drugs. I still get a craving for a cig occasionally. I just don't act on it.
I just realized I had repeated some of what I posted earlier, regarding smoking. But I think it's worth repeating.