Did i just loose my crush?

i met this guy online early july , we talked for a while then exchanged snapchat then phone numbers . we texted everyday , phone calls and FaceTime i really like him 
on AUG 4 we went to dave and busters for his birthday as our first date, the second date was last Wednesday to tgiFridays , he told me he likes my company , and that he likes me and we kissed. on Saturday we went to the beach and end up having sex , he dropped me home and didn't text me when he got home like he did before , the next day he texts me at 4pm , no good morning text like he always does.. now I haven't heard from him all day .. what the heck happened and whyy 😔