Running

So I am really freaked out that I am not going to be able to run well at the Independence Day run in Redondo Beach.  I have been having a really hard time training since my wife had her surgery 4 weeks ago.  And now, last night when I decided to do an easy run (the loop in my backyard, no elevation), I roll my ankle and most likely won't be able to run for the rest of the week.  Super bummed and concerned.