I'm seriously considering not doing the 5k now.
Backstory: I was signed up for the 5ks in January's Marathon weekend and February's Princess weekend. I've never done anything like this before and I'm not in great shape. I was working on it for a while, but then I had surgery last November and was in the hospital for 9 days, and then I had a serious flare-up of my hip and back problems in January (the day before Marathon weekend), leading to cortisone shots and physical therapy. I was cleared to start going to the gym again in February (the day the Princess 5k would have been) and then I sprained my ankle at work and had to put it off a few more weeks.
I did 3 miles on a treadmill at the gym yesterday and had a lot of back pain but got through it... But my time was about 18 minutes per mile, which I know is pretty horrible. But, I have the day off work for the event already, and I'll probably feel like I'm wasting my vacation hours if I just stay home.