Today is the day

Today is my first Dr.'s appointment and injection. It isn't a huge deal physically, but it is a big step in the process and I am scared to death.
At this step (in the last last cycle) I was so excited that I couldn't stand it! That day could not have come fast enough for me. I just wanted to get there and get the ball rolling- to feel like we were moving forward and making progress.
But, I am not excited at all this time. I am nervous, afraid, anxious and feel like I am going to puke all over my new white shoes.
I don't know where these feelings are coming from. Is it just because I am "gun shy" after a failed IVF? I don't want to be disappointed, I don't want to lose any more babies and yet my heart is prepared for that.
How do I balance trusting God, the creator of life, to work this out and yet prepare my heart that this might not be the way that He chooses to do it?
Please, please say a prayer for me today, that God would give me a calm heart and pour His peace on me.
If nothing else, for the sake of my shoes. I just don't think that Rusty would let me buy another pair! ;)