Don't let that small stuff freak you out. The real horrible part is yet to come, declaring a major and hope that you have all the right GE for that major. Hopefully you do and haven't taken to many unnecessary classes in the process. Then there is my personal favorite of all, the graduation is put off another semester do to this one class you didn't do somehow and it's only offered in the fall and fall just ended last week, one more year...
So I've seen that happen personally. So take my advice if you may, figure out you major ASAP, take those classes only and check regularly for requirements being met for graduation and major...