I placed an order with Medtronic last month. Everything except the sensors was delivered a couple of days later. The following day I phoned Medtronic to find out when I could expect the sensors to arrive. I was told to phone a week later, if I still hadn't received them. She didn't mention a production problem, but I did wonder if that was the case. They still hadn't arrived a week later, so I phoned again and while I was speaking to Medtronic, the delivery man rang the doorbell. I half expected to find only one box of sensors but received all of them.
It is quite worrying when you are reaching the end of your last box of sensors. I restarted my 3rd last sensor as a new sensor (after charging the trasmitter), as I was worried I would be left sensorless. I have a very sensitive skin, so don't like reusing sensors but luckily my order arrived, so I didn't have to use my next sensor for more than 6 days.
I hope your order arrived soon!