Declaring Senior Year(Feel like a loser)

Hey, has anyone ever declared their major at Berkeley on their senior year? I'm a junior who's going into his 2nd semester and I'm going to be declaring data science by the end of summer 2024. I've knocked down a couple upper divs but am just scared shtless cuz I am undeclared. I've already gotten everything in writing that I'm guaranteed to get into the major as long as I complete the minimum requirements but it's just nerve wrecking finishing my junior year as an undeclared student. I should be able to graduate on time though. Thanks!