L.D.
Hydrocodone is highly addictive so I can understand this second doctor wanting to be very cautious about wanting to prescribe it for you a second time. Now you mention that you don't want to go see an orthopedist because the cost of MRIs goes towards your deductible and you don't have the money to pay for it. I still don't understand why you don't want see an orthopedist. An MRI may not be necessary, but if it is to check for ligament damange in your rotator cuff for example, don't you want to get that checked out and treated? I understand about financial hardships but your health and wellbeing are very important. I'm sure that, if necessary, you can work out some kind of payment arrangement with the imaging place that won't cause you that much undue financial hardship.
You have to find out why you are still in a lot of pain from your fall. If you have injured yourself to the point that you require an ongoing prescription for hydrocodone then that is not good. You cannot be hooked on narcotics the rest of your life. Do what you must to treat your arm/wrist/shoulder injury.