How late can babies flip??

Laine

I’m 37 w and 2 d and my baby has been head down for as long as my provider has been checking. Even last night, my baby had hiccups really low in my pelvis. He just started getting hiccups right now that are much closer to my rib cage and I’m afraid he might’ve turned. I didn’t think it was likely he’d turn this late! Is it possible he could’ve? Is there still time for him to go head down if he did? My next appointment isn’t until Tuesday and they were planning on sweeping my membranes then. Does that change if he’s breech?