I would suggest being very honest with your doctor about your financial situation. Tell him or her you are having to skip doses and it is really hurting you. There are programs for those in need to help pay for psych meds. I was really hurting financially in undergrad. I had health insurance, but I paying large sums every month for abilify. I finally explained to my pdoc my situation. It turned out there was a program from the drug company to get a big reduction in the cost of every bottle of Abilify.
I thought because i had health insurance I would never qualify for financial assistance. Since I didn't ask for it, my pdoc assumed I must be fine financially. Case of incorrect assumptions on both parts. I was on that program for a couple years. It saved me a lot of money.
It's hard at least for me to admit financial difficulties. I recently needed forms signed by the Uni to apply for the first time ever for state food stamps. I felt humiliated and ashamed. Then I thought "you know, the Uni should be ashamed that I work for them and am so far below the established poverty line that i can't buy food. They should pay a living wage." I got the forms signed by Uni and have my food stamp card now. I am not proud, but I refuse to cower in shame or apologize either. Social programs are there as a safety net. So I need it right now. Big deal.