Antoinette,
I went to an Ivy League college for undergrad, and we had no requirement for theory either; specialization was by no means a requirement. In other words, I think you're in a pretty typical situation. However, if you want that background info, know that Yale's lit theory class is actually available for free online at Yale Open Courses. There are videos and transcripts of all the lectures, and I believe the course readings are also available online. (Yes, watching these videos is what I will be doing this summer.)