Last November I joined RUSA but have yet to do a brevet or permanent. I think I just committed to riding one (permanent) on the 21st of October, but I'm scared to death. I have done maybe four rides over 100 miles, and no rides longer than 30 miles since mid July, when I rode Triple Bypass (my longest ride ever, and since then I've been a complete slacker). I have this voice in the back of my head telling me that there's NO WAY I can ever finish a 200km ride, that I'm going to croak, etc, etc. How can I get past this mental block and just do it? Really, the worst that can happen is that I feel like crap, quit, and have my husband pick me up, right? (discounting a crash or something that could happen on ANY ride)

Help!