If you have been charged I'd worry a little bit less than those of us who haven't and have no movement either way. I'm still hopeful it's only Wednesday we still have two days before shipping actually starts. But once again I keep waking up in the morning hoping for a charge or a shipping notification.
Also, I know this may not be a popular thought, but Apple made no promises on the pre-order... they just opened up the ability to order and made no promises on what date it would ship or anything else other than the estimated shipping times we saw On our receipt for the pre-order which gave a span of a solid week even for those of us who ordered within 2 to 3 minutes. I know we all have experience with the iPhone and when you see a date on there that's when it arrives but this is something totally different with my phone I always got a single date not a span of a week.
On a somewhat positive note, my Amazon echo that I pre-ordered, from a gift from my staff, back in early December I just got an advanced shipping notice on it that it will ship to arrive on April 27... A week ahead of their estimated May 8 arrival.... So, at least we're not in that boat. 😝