not sure if she is??

Hello everyone! I'm new here. I'm wondering if my Persian queen is pregnant. She is about 11mths old. She is an indoor cat and the only male she is in contact with is my Persian stud. She came into heat on June 19-20th. I saw the stud mount multiple times, but not sure if he actually did the deed. She has not been in heat since. She feels hard in the belly area and is very affectionate. Oh, she is a smoke silver torbie. he is a brown mackrel bicolor.

Welcome to the site

Have her nipples pinked up ? About three weeks after conception ( if pregnant ) their nipples change color from pink to a raspberry red color.

I will check.