Of course, you are getting nervous. Chances are small you get accepted. Look at Yale’s accept rate. If your grandfather has a live contact that could advocate, it could tip the scales. Legacy is no longer a string hook these days.
You’ve done as well as one could, academically, so you are definitely in the consideration zone. The rest comes down to chance. Hopefully, you are not just focusing on Yake and have some other good choices on your list. Take is not a match or cinch for anyone.