Down 45 on Ozempic here and I had a similar scare last winter - what saved me was having my doctor's office send the script to a small independent across town that chains around San Diego couldn't match. The partial fill idea is worth pushing on too, it bridged me for a couple weeks once. Don't let a shipping problem undo months of work.
Pharmacy couldn't fill - backorder again
Down 68 on Trulicity myself so I know how scary an interruption feels after that much progress. When my Miami area pharmacy kept striking out, I started calling independents in different neighborhoods the same morning, and one had stock when the big chains didn't. A transfer to a branch that actually has it on the shelf seems like the least sketchy route from what folks here are saying.
Same supply headache hit me on Wegovy in Richmond last spring, and what worked was having my doctor's office send the script to a small independent in Short Pump that the chains here couldn't touch. Calling around early in the morning before their stock lists updated seemed to help too. 58 lbs gone and I wasn't about to let a backorder stall it, so the extra legwork paid off.
Only a few pounds in myself so I can't speak to long stretches yet, but the repeated backorder pattern you describe is exactly why I started asking my pharmacy to check neighboring locations before giving up on a fill. One small independent near me had stock when the chain I use struck out twice, so the transfer route others mentioned seems worth trying. Don't let a supply gap eat at the progress you've already made.
Ran into the same wall with my Zepbound at a chain here in Lexington, and the thing that finally worked was calling a couple of the small independents in town first thing in the morning - one had vials the big chains didn't. Down 33 lbs so far and I wasn't letting a stock issue stall that, so the phone calls were worth the hassle.