<human>: Can you condense the text into three sentences or less?

Little background: I adopted this cat last year from Craigslist, the original owners' youngest was allergic so they had to give her up. She's a 7 year old calico, declawed and spayed (by them). She's also strictly indoor, but we let her out on our porch every now an then, usually I'm with her (we live on the third floor).

We went to the vet a few weeks ago to get her vaccinations. They were overdue because when we got her the previous owner said she was due in September. 

She got the three years rabies vaccine, bordetella, and two more. One of the vaccines was administered through her nostrils (one drop each).

Onto the issue.

She's sneezed before, no big deal. But I noticed about six days after her vaccinations, she had huge sneezes. About five in two hours. Extremely abnormal for her because she doesn't sneeze every day. It's very rarely. And when she does sneeze, they're usually little sneezes, nothing that I would be concerned about. It's been about a week after that, and she's been sneezing more frequently. I wouldn't say everyday, but it's a noticeable change.

Today, she has sneezed *several* times, all of which have been big and I'm starting to get worried. She's also done that thing where we feel like sneezing but can't get it quite out.

I've been watching for any yellow/green discharge for signs of infection and haven't noticed any.
<bot>: cat sneezes several times today, very abnormal for her. Is this a sign of worry? Am I overreacting?