Ugh, that sucks... depending on the pharmacy (and relative rarity of your meds) you may be able to have them find some for you. That said some shops, chain retail especially, are too understaffed to do that kind of legwork on a patient's behalf. If you're able to find some then there's a possibility you could have your rx transferred somewhere that does have what you need. Process for that varies from state to state though (I'm assuming you're in the US)