Sciatic Nerve or Ruptured Disc Help

I have been having a lot of pain in my lower back, off to the right of my spine. My experience pain and tingling/numbness through my buttocks on down my thigh. I have had this for a few years but it has slowly gotten worse. The past 2 months have gotten terrible. I had been seeing a chiropractor, never getting results as I thought it was my lower back was out of place. I finally went to a MD and she thinks I either am suffering from sciatica or a ruptured disc. Until they perform x-rays and an mri they will not have a final answer. I do not have health insurance so I am trying to avoid going to far with all of the tests at this time. It causes me to get irritable and my physical activity has went down extremely. I'm curious if anyone has ever had problems with sciatic nerve or had a ruptured disc? If so, what did you do? What helped the pain, what made it worse? Will weight training flare up the pain? Any information would be appreciated!