Hi Tonya,
He may have blocked you overnight because he may have reached a point in his relationship with you where he isn’t quite sure of where he wants things to go.
When guys come to this point, they sometimes shut everything off as far as how they communicate with that person because they just want some room to think and figure things out.
Once he has, there is a good chance that he will unblock you.
So don’t panic. Just give it a few days.