Is there any financial help available for low income people with insurance taking Topamax

My name is Ruthie and I am a single mother to my four year old son, I am also a college student, and I work part time. I am currently prescribed to Topamax 50mg 2x daily for my migraines (I am so ecstatic to have finally found something that works for me!) The downside of my situation is that I am having a very difficult time affording this medication, as my insurance is medicaid and they will not cover any part of the Topamax (even after my doctor filled out a prior authorization form.) The pharm. reps quit bringing samples to my physicians office, since supposedly Topamax lost it's patent 09/26/08 and should be offered by many generic companys soon. I have applied for the patient assistance program available through J&J and they denied me, I am at a loss of where to turn and have exhausted my finances to a point where I can no longer continue. I am trying so hard to build a solid, strong future for my son and I (this is why I went back to college) although it seems as if every where I turn I am hitting a huge brick wall, if anyone has any advice on any financial help available for people in my situation please let me know. Also if anyone has any information on when Topiramate should be approved (http://www.accessdata.fda.gov/scripts/cder/drugsatfda/index.cfm?fuseaction=Search.Overview&DrugName=TOPIRAMATE, says tentative approval) or available in the US then please let me know because at this point in time any information would be greatly appreciated.