Something I did when my H and I started spending a bit more time together and things were really weird...
Imagine what a positive out come would be. Picture in your mind what would happen, how it would feel, what would you be doing? This really helped me. In moments of stress I would sit back, visualize things going well, and feel better.
You'll do great!. It is normal to feel on pins and needles at this point. It IS a new relationship you are starting. And it IS in the early phases- which is why it doesn't work to just move back in and pick up from being married. This finally makes sense to me- even though Jody said it to me a month ago...
Start small, don't push, enjoy your time and relax! Will be thinking of you today.
After my W and I separated briefly in April; I told her that we would have to start a "new" R. Only neither of us did, we did exactly what you warned about. We tried to pick it up the M where we left off; and it was an abysmal failure. Now, we're separated in the same house again; but I have new tools.