Post-delivery: Pads or Disposable Underwear?

I'm looking for suggestions in regards to pads or Disposable Underwear for post delivery bleeding and recovery. Im about a size 3x right now at 39 weeks so I'm really worried that Depends and other brands won't fit me even after delivery, I've been told by my Midwife that they run really small. I used period underwear before pregnancy but those also won't fit me right now. Is there any alternative to just using pads and liners? Looking for suggestions and advice. Thanks.