Moody Mooday

Next Sunday I will do a duathlon...
It will consist in running 5K, cycling 20K and running 2.5K
I am glad about it but at the same time I feel a bit scared because I completely ignore the route and its elevation.
I have heard that it is terrible, and at the same time I haven't trained enough since the triathlon, but anyway it's only to have fun and to enjoy with my friends.
Why is it that sometimes we feel more comfortable and confident with some races than with others?
When I was about to race my triathlon, even though I was scared to death once I realized that I'd have to run at 1:30 pm and having a temperature of more than 36o, I was very excited and it was the only thing I could think and talk about; but now I don't feel the same, and I don't know why...
Is it that I need the swimming part of a triathlon? Is it that I am scared about the route? Or is it that many other aspects in my life are affecting my "training libido"?
I do not know, but still I'll enjoy it and I am sure it will be an unforgettable experience...
The route, as difficult as it is, seems inevitable and unchangeable; external aspects will always be there and my temperament should be improved by the endorphins generated by the duathlon; and about swimming, well I can swim next Monday, can't I?...