Getting nervous..

So the Warrior Dash is next weekend. 6 days away & I still can't run?  I mean I can run but I will pass out.  I keep telling DH I am not running and he laughs and says oh yes you are.  I mean he witnessed the horrible lack of my abilities during our hike a little over a week ago.  I have been doing some exercising w/ Jillian DVD's & my elliptical since we got home I've worked out 4 times and I've been consistently sore so I now I am working something right.  We are doing this w/ my BFF & her DH and my BFF has lost like 70 lbs in the last couple years and found a love for running and my DH somehow went from hating running to being able to go out and do a 5K in about 30-45 mins.  I haven't run since high school and that was only for warm ups in Volley Ball.  Every time someone would see me really run, like sprint, I tried to get talked into joining track but I never wanted to because none of my friends did it. The worse part of running/jogging for me right now is all the body parts that bounce around when I do.  My boobs, my stomach, my double chin, it is so embarrassing.  I am not sure how this is all going to go down. Fingers crossed I don't pass out during the whole thing.  Again I am not worried really about the obstacles it is just getting from one to the next that concerns me.