hi ryan, welcome to Siliconhell!
sorry to hear about Sassy (I take it thatÂ’s her name)
she may have just done something around the house, like jumped funny, and is hurt a bit.
have you tried stroking her back? does she move away when you do it? has she gone off her food at all?
it may be worth taking her to the vet to have her checked out, rather to be safe than sorry that there is nothing really wrong.
keep us updated on how sheÂ’s doing.
L-G