Press send. Put the phone face down. Go make a sandwich. The brave part is already done.

The difficult act ends at the moment of sending, and everything after it is waiting dressed up as involvement. Watching the screen adds nothing to the outcome and quietly converts a completed brave thing into an ongoing anxious one. The result will arrive whether or not you supervise it.

Send it, then physically put the phone somewhere else and go do something with your hands. Do not reread what you sent. You have already done the part that required anything of you.