NoNo-- I totally feel your pain!

My first century ride was a beast with over 3000 feet of climbing, most in the second half and I was riding with a bunch of people I didn't know-- mostly cycling team hammerheads! I paid good money for the registration for a t-shirt, the bbq after... the century took me ten hours. I sobbed as I climbed the last thirty miles or so-- I was in so much pain! I stopped often. I felt awkward that I was making the sag wagon guy wait so long. I crawled into my car at the end and just sobbed-- I'd done it... but I felt kind of humiliated that there was nothing waiting for me at the end and that I'd spent all that money registering for nothing. Bummer!

Anyway, don't let it put you off-- you'll be able to do it, you probably just need to prepare for that kind of long ride a little longer! I haven't done my second century because of my first one yet-- even though I'm getting better!