Baby Harper's medical expenses

Harper was born September 22, 2014 to my daughter and son-n-law.  She was 5lbs 15oz.  My daughter was a pre-pregnancy diabetic and they were having a little issue stabilizing Harper's blood sugar (it was low).  She had a heart murmur at birth and it showed up again on an EKG.  The doctors were not really concerned with it because we were told most new borns have one.  They were to be released on Friday, September 26th to go home and begin their journey of being new parents.  The NICU pediatrician wanted to do a ultrasound of her heart, just to be on the save side, since there had been the other issue.  She stated it was probably nothing...The scan came back and showed that she had 3 heart defects.  She has atrial septal defect and ventricular septal defect as well as Coarctation of the aorta (narrowing of the aorta).  She had a follow-up appointment with her cardiologist on 10/3/2014 and during her ultrasound they found that her heart is getting bigger, but her aorta is the same size.  She was then transferred to Children's Hospital.  They have told us that the only way to fix it is heart surgery.  Mom and Dad are so worried as well as the rest of us.  Neither one of them get paid when they are off work.  They do have insurance, however you can only imagine what their medical expenses will be with Harper being in the NICU at Baylor for a week and now at Children's.  They have told us that she would be in for a minimum of 2 weeks after surgery (if no complications) and 4-6 weeks (with complications).  We all know that the bills don't stop coming in when there is an emergency, infact they get bigger...please help us lighten the burden of Harper's medical bills....Thank you in advance and please continue to pray for her and Candice and Eric.