well this is how it began=/, yesterday my cat ingnored averone and sleeped under the bed for the hole day and looklike he was deppressed and sad, then the next day he was fine ,eating walk puring when you toch him , and then i noticed that the begining of his tail the bas got a little fater and amost duobled the size, and he cant put his tail all the way up and turn in a little bit like he alwase did, half of his tail is just hanging low when the othere half is standing high when his happy and or curoise etc, did he brake the tail? becuse this never happend, he feeling normal and doing everthing he used to like reguly but have his tail never goes up and only the downer part dose , what can cusedd this and should i take him to the vet?