I need help! I'm looking for a good interview blouse for under my navy Sejour suit, for winter. It needs to be extremely conservative, as this is for a medical residency. The complication is that I am a size 16-18, and I haven't been able to find anything good. I was hoping for a silk blouse, or at least a soft one, so there are fewer issues with gapping in the front, but if I have to, I'll settle for a starched blouse. I have more questions after I solve this one, particularly regarding winter in the north and formal interviews, but this is the most pressing.

Thanks in advance!