Will I become a warrior tomorrow?

Well tomorrow is the big day. We leave her at 8AM for our Warrior dash tomorrow. I am really scared about the 5K part. There is only one obstacle I am worried about & that is the one that requires getting my body out of water onto a floating platoon. Why didn't I prepare more for this? Did I assume I would just back out?  90% of my life everything there was something new I decided I wanted to do. I would sign up, pay for, make plans to do.  The day before I would get so upset about the what if's I wouldn't go. I would use my parents as my excuse as to why I couldn't or I would get sick. This prevented me from having my 17th birthday party.  One of my closest friends, to this day, & I birthdays are hours apart & all during high school we celebrated them together. For our 17th she decided we should go have an adventure Down Town Seattle. Granted I lived in Seattle so I wasn't to excited about the idea but I went along w/ it thinking sure it'll be fun..... Well the more I thought about it the more worried I got. I had seem some crazy stuff down town cause my Dad was a pastor at an outreach in heart of it all and I decided I really didn't want to go.  It was my own birthday party & I opted out.  I never got any presents from anyone that year and no one really said much to me about it. So then I got depressed figuring they had a better time w/o me anyways.  The next time I can remember was our Senior trip. We were going to the Edmonton mall in Canada.  I was so excited!  Planed w/ the rest of the class and then backed out. I didn't go, I said my parents wouldn't let me and that really wasn't the case. Then for wedding my BFF & her husband gave us a River Rafting trip w/ them to Harrison Hot Springs in Canada.  I cried the night before I wanted to back out SO bad!! I was terrified! DH said we couldn't back out & we went. My BFF made fun of me all the way to the river rafting place because I think I was literally shaking. But I LOVED it! My BFF wanted to back out 1/2 way through but once we did it I was so glad we did.  Then DH & I have had multiple opportunities to go on trips other places but because of my fear we never did, until our trip to Boston.  Now tomorrow has a slightly different spin on it. Not only is it something new & the waiver I had to sign has scared the crap out of me, it has the word death on there like 6 times.  I also feel very under prepared physically. I am the largest I've been & haven't worked out in a week. And the working out I've done has been kicking my butt. My asthma is what I am most worried about physically.  The last two times I went on a bike ride w/ DH I had major asthma attacks and both times my legs were not even sore afterwards but my cardiovascular is so bad I am worried I won't be able to breath.  I am bringing the inhaler & plan on using it before we even start to open up my air ways.  I started looking at the over all times posted and the average longest this takes some people is about 1hr & 20mins and I am thinking if I walked fast I could do it in that time. Then I saw some people who took 1hr & 45mins & that made me feel a little better then I saw the last time entry in the Florida one for this year and it was over 7 hrs.  My jaw hit my keyboard.  I thought to myself, If he can do it so can I!