Liver

My doctor's office called today while I was at work and left a message that they have scheduled an MRI of my liver in 4 days. I'm panicked! I had an ultrasound last Friday, and am just at the very beginning of my program. It's Aug...and I can't have my surgery until Dec. due to Insurance requirements. Should I be worried? They are out of the office for the weekend, so I can't call till Monday. I know that fatty liver is common...I just don't understand the huge rush by my doctor to do the MRI...can someone please give me their experiences with this...could it stop me from having the surgery? I'm currently on a high-protein, low-carb diet prescribed by my PCP for 3 months.

Thanks!