Other responders need to chill. 26:30 at the D1 level is slow but collegiate xc runners tend to improve a lot between midseason freshman year and end of season senior year, because few are ready for the distance, especially with added fatigue from practicing with faster guys with harder workouts and higher mileage than high school. Get plenty of sleep, gradually improve your mileage, and take your easy days easy, hard days at coach's target pace. You should be mid 25s by the end of this season if you taper correctly. Over the summer, if you run higher mileage, you'll see massive improvements and maybe break 25 next year, which would get you around average for D1. Average is very good, because there will be very few road races outside the NCAA in the country where even the winners are ahead of that pace.
As for the knee injuries, you need to do preventive and strengthening exercises every day or other day. They would take the form of quad strengthening exercises with ankle weights, calf extensions, body weight squats at least, step-ups, the occasional eccentric calf drops on a step, bridges, and step-over/back of something several feet high.