Hunching

it seems like my baby is hunching, and i’m not sure if it’s something to be worried about, she is still eating hay, pellets, and drinking water. she continues to binky around but i’ve noticed that in some moments she stops and hunches for a minute or two. She’s done this before but only for a few seconds and then she flops over to lay down. She has a vet appointment coming up on the 11th for her booster shots, I plan to mention it but I would also like to hear some insight or thoughts from others and see if I should get her to a vet earlier. (also she is free roaming 24/7, she prefers to rest in her cage though)