I remember the day I mailed my I-129F. I was a wreck. I remember my hands were shaking so hard the postal worker looked at me very strangely. I said, "Heh, mailing papers to the government." He laughed. I got in the car to drive home and the song "Nothing Else Matters" was on the radio. Seemed pretty applicable.
Yep, as Tom Petty reminded me yesterday when the alarm went off "the waiting is the hardest part". I wanted to smash the radio.

Focus on what you need to do today and keep a big bundle of hope in your pocket at all times and the times does pass. Best advice I think I've ever received was not to hold expectations regarding time frames. That puts more stress on you then you realize.