If I were you I'd stop running 2 miles 5 days a week, I'd move to one short interval sprint workout(10x100m, 6x200m etc),one tempo run(keep same pace for each set i.e. 4x1200m, 2x 1mile) and one longer distance run 4-5miles. The other 2-3 days a week I'd do some low impact cardio(Elliptical...