I ship everything with tracking so if you ever notice it stuck at one location for a long time... it may appear to be lost. The first step is to contact me via the chat bubble on my page so I can ping my local postmaster.
I also recommend submitting a lost mail inquiry to the USPS. I have seen packages magically appear after the inquiries were submitted.
However, please do not worry... Once all the normal avenues have been checked and the package is confirmed to be missing in action, please know I will remake it and ship a new one out as needed.