Hey there! In some careers, graduate school is required in order to proceed with licensure, professional certification, or as an entry-level requirement (for example: physical therapists need a doctorate degree; licensed mental health counselors usually need a masters degree at minimum). For public relations, though, the bachelor's degree is still the entry-level degree. Having a masters degree with little experience will not give you an "edge" - the PR industry still heavily favours experience over advanced academics. Focus on getting a good internship for this summer and perhaps another one during your senior year. Establishing a relationship at your internship site and performing well will set you up much better than a masters degree. Good luck!