My doctor was good at giving me samples as well, but when he ran out I told him I couldn't afford it on my own and he put me on another generic medication that worked very well, a 90 day supply for 10.00.
I do wish I could give you some advice. When I was unemployed for 9 months I was paying $154 a month for my Cymbalta. I pray you find some answers.
Always good to ask your prescribing doctor and pharmacist too. I know my doctor often shot me a few free samples of cymbalta when i was on it to help offset the costs.
Sometimes the makers have a program that will reduce the cost for you. Google them and contact them about this. Good luck and take care.