I know the feeling of not writing anything because I can't decide where I want my characters to go and I don't want to commit to a path that removes all other potential pathways...which may be better.
On the NaNoWriMo website they have pep talk pages which are worth reading.
This gem stuck out, by Janet Finch (her therapist came up with it.)
"I know it feels like you have all these options and when you make a decision, you lose a world of possibilities. But the reality is, until you make a decision, you have nothing at all."