Went to vets to finally get her spayed and was told she looked as though she was having a phantom pregnancy and they'd have to delay it. We hadn't noticed any symptoms but since then she's been a complete loon! Constant whining, howling at night, shaking, not eating and making nests out of the sofa cushions. Am being kept awake most of the night - any ideas how long it'll last? She's nearly three but only just had her first noticable season a few months ago.