Ghosted On Hard Close

Hey Boys There are multiple occasions in which I get ghosted on as soon as I hard close. Was talking to this girl and we were responding to each other pretty quickly. As soon as I hard close, I haven’t gotten a response in 3 days. In this interaction, she agrees to the soft close and seems pretty interested. Firstly, what should I double text with? And secondly, was there anything wrong with my hard close text? This happens often enough that it has me stumped Cheers boys