I signed up for a 5k!

I may be crazy! I am not a runner.  I hate to run.  Two months ago I could not run for 60 seconds without stopping.  I was in horrible shape and had put on 30 pounds over the past 2 years so I decided I needed to do something.  I started the couch to 5k program in June and spent 3 weeks repeating the week one workout.  It consisted of warming up with a brisk walk for 5 minutes and then alternating 60 seconds of running with 90 seconds of walking for the next 20 minutes. I couldn't do it the first time I tried and at the end of 3 weeks could still barely get through it but decided I better move on to week 2.  It is now August and I just finished week 3.  I can run for 3 minutes straight.  In 25 minutes today I went 1.62 miles including my warmup.  Which means I should be able to finish a 5k - providing I don't pass out in the middle of it - in an hour or less.  My goal is 30 minutes, but I'll be happy with 45.  Who am I kidding, I'll be happy if I finish without collapsing!