Potty training sign?

So my daughter was saying poop this morning around 9:00, so I kept checking her bum, no poop in there. So I figured it was just a fun word for her to say, shes 20 months. Anyway I laid her down for a nap at 10, she started calling out to me at 10:30, saying all done. I walk in and she got the diaper pulled off her saying poop, yea she pooped in her bed.

Is this a sign of potty training? What do I do now at this point?