What’s happening?

I feel certain that I will achieve my X goal. I know that it’s not a matter of IF, but WHEN. I am afraid, though, of setting the deadline/making a plan – whether it is 3, 5, or 7 years from now. I think it’s because part of me is afraid that I won’t be able to achieve that goal by that time I plan. It really bothers me because now I tend to procrastinate and don’t have the sense of urgency. I am just telling myself that it will happen someday, but am not doing much to actually make it happen.