Melby

I've got a 2013 Journey and it has been a good vehicle for us so far. However, in the last year an annoying groaning or creaking noise has come into the drivers side door. It is only evident at very low speed, more especially as I drive it on slightly uneven (pavement) surfaces, going around a round about, turning a corner. It doesn't seem to bee a hinge type noise. The door has not had any damages. Any ideas? Melby