Is it common for a spayed(or maybe not) cat to go into heat?

Question

so my year plus cat who was spayed at approx 6 months is acting strange, typical symptoms of a cat in heat(more vocal, affectionate,l*****g)...also noticed an odor from perianal area...she has long hair so I think maybe she needs some help cleaning and I see blood...so it is too late to do anything tonight but I am panicked,,,is there much of a chance that the supposed spaying somehow did not happen or didn't ''take"or should I be panicked?

Answer 1

see a vet a.s.a.p

Answer 2

Sometimes inexperienced veterinarians may not completely remove the ovaries ( not on purpose though ), thus, causing her to go into heat.  Take her to an experienced veterinarian to find the cause of her bleeding.

The ovaries and uterus are removed, not the cervix.

I was a veterinarian technician for 7 years.

Answer 3

When a cat is spayed, her ovaries, cervix, EVERYTHING is simply removed...There is absolutely no way that she could be in heat..

You say there's blood, and shebeing very vocal ?

There's no need to panic, but there may be something very wrong with her...First thing in the morning, get her to the vet, o.k. ? Even if you have to skip work..