Nerves! (short but sweet!)

In 3 weeks from now we will be sitting in Perth airport..about to head to America.

I am starting to have more nerves than I realized possible... why?

Let me break it down.

1.  I am scared that with all the go go go, as soon as we get to America, I will want to come home.  Home as in Perth.

2.  I am scared that once we DO come home, I will be extremely home sick. 

3.  I am scared of running into the ex.  My mom has said if he tried anything he'd be dead (between her, my dad, Wayne, and our friends).  But, that fear is still there.  Not sure how to escape it?

Suggestions??????