my cat had been spayed 4 weeks back. when i took her to my vet today he said that she was lactating and i saw that the amount of milk that was being secreted was sufficient to feed a couple of kittens. she wasn't lactating a couple of days back.she is currently 1 year old and has never mated before let alone littered. my vet says this is highly abnormal post spaying and that it could lead to mamary gland tumour. m scared. plz help.