Do cats vomit more when in heat?

I have never heard of this as a symptom of the breeding cycle.

It may just be a coinicidence and she is agitated and has a nervous stomache or a minor case of a bug. Cats can contract similar viruses for stomach flu.

I wouldn’t be concerned unless it continues for more than 2 days or so.

Here is a list of causes of why cats vomit. Being in heat is not among them.

As @Coloma said, nerves and agitation can upset her system. Is she eating and drinking?
If she is able to keep down food and water, you can probably wait to see if the vomiting subsides.
Is there a reason you aren’t having her spayed? Cats aren’t like dogs, they don’t have “seasonal” cycles. She will go into heat repeatedly until bred or spayed.

If anything, she seemed and still seems downright chipper. She vomited two more times the next night, and then it stopped. So I really dunno. She’s the only cat in my rooms, and doesn’t go outside. My roommate has a cat too, but they’re completely separated.

@Blueroses: I intend to get her spayed, but I don’t have quite the time to dedicate to giving her painkillers on a specific schedule right now. It may need to wait until February.

@bolwerk You shouldn’t need to give painkillers at home. Most vets will give a long-lasting painkiller injection before releasing her. I’m glad she’s feeling well.

The vomiting was just kind of inexplicable.