Hi Hillary
I would agree with therapist101 about the eccentric exercises.
Also very important is gradual hamstring stretches, concentrating more on the hip flexion component than the knee extension component. be careful with these stretches as you dont want to aggravate your lower back - see your therapist to explain and supervise the stretches.

And then it would help to try a doughnut pillow when sitting to relief the pressure off the ischial tuberosities.

Good luck