Also, with UCLA, you have several options. There is a classics PhD program, an indo-European program and a separate linguistics program and applied linguistics program. Be careful that you match the department you apply to. The IE program which allows you to study quite a number of Indo-European languages is likely the best fit but the classics program allows you to take courses from the IE program too. Someone I studied linguistics with is currently undertaking a PhD in the linguistics program and it is extremely geared towards phonology and syntax and, something I find very curious, is cut off from applied linguistics (i.e. pragmatics, language learning and teaching, stylistics, discourse analysis, etc). The linguistics program definitely expects the equivalent of a major in linguistics and may not be the best place for you to apply.