Should I worry if I don't get into a Chemistry course fall term of my first year?

No. Often, it is not possible to get into Chemistry 123 or 128 in your first fall term at Carleton. You should be able to get into one of these courses in winter or spring term. If you don't get into a chemistry course fall term, you can focus on taking a language course, a Mathematics course, a Physics course, or some other courses that interest you. During New Student Week, there will be support for making these decisions, in addition to the pre-registration you did over the summer.