Well, who would have thought that I was actually going to do this? Actually, after completing run 2 I felt quite confident, and as soon as I left the house this morning, I knew that I was going to make it! I started slowly, but once I had done the first 10 minutes, I picked up the pace a little.
To anyone that is worrying about week 5 right now, DON'T!! Just keep putting one foot in front of the other, minute by minute, run by run and you will make it.
Thank you to everyone who posted their own successes. Reading your stories was invaluable and convinced me I could actually run for 20 minutes without stopping.