Here is a tip that might help you find where your shipment is. I have an order in shipment now. The site I ordered from provided a tracking number but it still reads tracking is currently not available today. I copied the number and went to the USPS tracking site and pasted it. There it is. Two full days of information. A simple thing that I've overlooked to try before. Hope this helps somebody else 
https://tools.usps.com/go/TrackConfirmAction!input.action
https://tools.usps.com/go/TrackConfirmAction!input.action