Mating calls?

It passes, then comes back, then passes again. But yeah, they're looking for love!

Oh no! She wants to mate with the cone of shame :(
As I've learned with Blue, they are pretty insistants when they feel the need.

Yes, they go into heat. It is when it best time to mate.

I don't think this is working as intended though. I spayed my cat and she keeps wanting to mate. I've also read that someones cat got pregnant even though they were spayed.

My Australian Blue Heeler does her mating call, even though when I adopted her, she was spayed. I took her to the vet to check to ensure she was spayed, and it said she was. She does the call every five seconds and it's starting to get annoying. Does anyone know how to fix this?