No definatly not just you, i have been pounding the strrets since June and done 10k 3 times a week with some runs of 10+ miles but am still worried about the big day, have i dont enough, can i do 13 miles.
I have never done anything like this before and some poeple have said you hsould have done a 10k first but i guessed if i was doing 10k 3 times a week then that would not help, so wanted to stretch myself.
I think we will find on the day that the mlies will go faster than we think especially the first half, i have no doubt it will get harder in the second half when we pass the distances we normally have done but the crowd and hype of the day will drag us along the final few miles.
I see from here people that have done less than me and others more, expect you see the same and i expect we will all end up at the finish some more knackered than others, some faster than others, just take you time dont get carried away trying to keep up with others and just enjoy it.