Diastisis recti or hernia? (photo)

I've had two kids back to back, and am currently at 15 months post partum. My belly isn't very nice looking anymore. I have a weird bulge that appears when I tighten my stomach muscles or when I sit up from a laying position. My chiropractor didn't feel a diastisis recti, but said it might be a hernia. I have an appointment set up with a PT on Monday to look at it, and with a surgeon on Dec 1. I'm including a picture- please let me know what you think.