FIG. 1 is a front and left side perspective view of an intravaginal device embodying the claimed design. FIG. 2 is a front view of the intravaginal device of FIG. 1. FIG. 3 is a rear view of the intravaginal device of FIG. 1. FIG. 4 is a right side view of the intravaginal device of FIG. 1. FIG. 5 is a left side view of the intravaginal device of FIG. 1. FIG. 6 is a top view of the intravaginal device of FIG. 1; and, FIG. 7 is a bottom view of the intravaginal device of FIG. 1.