Well, a Dr can treat you for your symptoms and save the official diagnosis for after you have the job and insurance. Tell him straight up if he has it figured out to keep it out of the paperwork for a bit and why. Most Dr's would have no problem with this, especially if it's your PCP that knows you and your situation.
Also, if I were you, I'd try some NSAIDS and see how that works on your symptoms. Start at the minimum dosage for a week and if that doesn't help increase it, and always take them with food or milk. When I could still take NSAIDS, Alleve and Ibuprofen helped the most.
Keep us informed and I hope that helps you and that you're blessed with a new job soon!
DDD- MRI confirmed probiotics
Arthritis-xray confirmed Neurontin
disc slippage in neck-MRI confirmed Oxycodone
Fibro- night sweats Zoloft
IBS-D-gas cortisone shots
Ulcers-endoscopic confirm Baclofen
dishydrotic eczema Trazadone