The pop or click COULD be just from her tongue darting in and out and making noise. It is also not uncommon for them to get a piece of shed stuck in a nostril which makes a whistling noise.
If it were my snake, I would keep an eye on her. Feed like normal and maybe reduce handling. Meanwhile, put together an emergency vet fund and research a vet in your area that you would take her to.
However, use your best judgement and take her to a vet if necessary. Building a good relationship with a your vet is never a bad thing.