Hope you've had some success getting food in him. It's been a week since your original post. There is also a sticky post in the bp husbandry forum on assist feeding. I highly recommend you try it before more time passes looking for a vet. Honestly, unless the vet can tube feed him or has a pinky pump, I'm not sure the stress of a vet trip is worth it. Get some frozen mouse pinks and thaw one in warm water for 10 min, make sure its warm all the way through, and try assist feeging. I use mouse pinks cause they are super small and easy for them to swallow and easy for you to keep in the snakes mouth. Bigger prey can be spit out easily and takes more effort to swallow.