How do I qualify for six or ssa, having been turned down twice?

I hAve 2 synthetic discs in my neck, titanium wire, from an accident. After 6 years, my neck and left shoulder give me constant pain, inflamation, and steadily growing worse. I've been to the Dr several times, because they seem to seize up, not being able turn or bend my neck of lift.y shoulder all the way I suffer .massive migraines as well. I applied for six after the surgery, and was denied . My 13 year old son is legally disabled. I'm a single mom, with 2 underage children not getting child support and very !little help from the state. I have been out of work since April 1st, and have job applications all over. I'm 47, and not in the best of shape. I need help, badly. I'm behind on rent and every state office seems to think it's a joke. We're surviving on my son 's $702 disability check, and we are going to end up homeless unless someone can help us.