Can A cat go in heat if she is pregnant

[spikeycow]

As title

[Mr Veritas]

Having had many cats in our lifetime I would say no,but our cats were always spayed/neutered, and of course animals can always surprise us.
However,I would call Cats Protection Advice Line (the UK's largest Cat Charity) on
National helpine: 03000 12 12 12
and they will be able to give you a concrete answer.

[boxtops]

Ring your vet (or if it's not your cat, ring the PDSA).