The vet you're booked with, ask them what you should do for your rabbit while you're waiting for your appointment in 2 weeks. I would ask them about pain relief, if it's ok to give some baby aspirin. Or maybe they will let you come pick some metacam up. It's an anti inflammatory pain reliever that is often prescribed for mild to moderate pain in rabbits.
https://rabbit.org/the-importance-of-analgesia-pain-control-for-pet-rabbits/
http://www.medirabbit.com/Safe_medication/Analgesics/safe_analgesics.htm
It's also important to ensure your rabbit is eating and drinking normally, and if not then you will also need a syringe feeding mix(oxbow critical care or sherwood recovery mix, bought online or from your vet) and feeding syringes, to syringe feed your rabbit regularly to prevent GI stasis from occurring.
When there is no open fracture, bleeding, and it's not an immediate emergency, pain relief when your bun is showing signs of pain, and ensuring your bun is eating(and syringe feeding if not) are the most important things to take care of until you can get your bun seen.
The vet should also suggest to you to restrict movement until you are sure it's not broken. If there is a break, movement should be restricted to a very small area until the bone can be splinted, to prevent the break and injury site from further damage from excessive movement. Preferably your rabbit should be kept indoors if he isn't already.
Medirabbit (bone fractures in rabbits)
http://wabbitwiki.com/wiki/Broken_bones