That's great news. I think the human body is incredibly resilient. I was certain that I blew up my liver and my pancreas, but all my tests have come back fine. Funny story: I was certain my skin was turning blue and that I was headed for death at one point...turns it out was dye from a cheap walmart shirt rubbing off on me.
As for ups and downs, speaking for myself I experienced periods of depression as my memory started to return. I had very little memory of 2014 at all, and as a lot of memories came back, caused mild depression for me as the brain fog lifted. It's normal.