Breast engorgment

I just had my twin boys @ 33 weeks on Tuesday. They are in the NICU so I have been pumping exclusively. My milk started coming in as of yesterday, however, my breasts are engorged. I have been pumping every 3 hrs for 15 minutes, massaging, and even used cold/warm compress. But they are still engorged. :( Not only am I recovering from birth but this is making me miserable. Does anybody have suggestions or gone through the same situation?