Turned down a rishta too soon and now I'm having second thoughts

Assalamu alaikum everyone, I could really use some guidance on this. A few days ago, I received a marriage proposal from a guy who seemed to have a lot of great qualities-decent character, good family, all the things you'd hope for. But honestly, his family kind of rushed the process and didn't give me enough time to really think and make du'a about it. In the moment, I felt pressured and said no, but now I can't stop thinking about it and I'm starting to regret my decision. Both he and his family seemed genuinely nice, and I keep wondering if I made a mistake. I even prayed istikhara after turning it down, and my heart feels more at peace with the idea of saying yes. Someone mentioned I could still change my mind, but honestly, I'm too shy and embarrassed to bring it up now. Has anyone else been through something similar? Should I talk to my parents and let them know I've reconsidered, if the other family is still open to it? Jazakallah khair in advance for any advice.