My 3 year old cat, Lilly, has been acting as if she is in heat for a month. She will scratch furniture and door frames, she also meows really loud and long. It's like meeeeooooooooooowwwwww. Can someone tell me what is wrong with her??

Some cats go into heat immediately after coming out of it. You can try talking to a vet if you're worried.

Check with your vet, and please get her spayed to avoid health problems and to give her a longer life. We do not need more unwanted kittens on this planet.