Nervous nervous nervous

ok, am really really nervy tonight ready to start this jogging programme.  It's been one thing plugging away at this myself, but it's another to be going out with other people who are miles miles fitter than me. I'll be keeping them back, and I'll be slowest and last at everything.  They said if needs be I can have one jog leader with me alone, but that's going to be embarrassing.  I'm actually on the verge of NOT going here, but I will.  I'm starting to have the "heavy breathing" panic attack type stuff, but I have to control that now and settle myself.  I'll just need to keep repeating my new mantra - "no matter how slow you are going, you're still lapping everyone on the couch"