Hello my kitten is 7 weeks old and yesterday i brought her to the vet to deworm and she looked healthy and was eating her food and drinking milk from her mother happily but today i woke up to see her lying on the floor (she doesn't usually sleep there, she sleeps in her own box) limp and not very responding i've put her on a warm place and fed her sugar water with a syringe and she seems to move a little but her neck is also going back?? (idk how to explain this) her gum is also very pale... can someone please tell me whats wrong with her?