Relief,
I am on Day 19 and felt exactly as you described until a couple of days ago. It's somewhat better now, but a long way from "normal" or at least calmer. And it changes during the day: I feel OK then I fell like crap, repeat. So you are right on schedule.
Stay close to SR or go to meetings. But try to have at least one support group. SR has helped me tremendously so far!
Good luck,
OB