My lower back hurts, i was sitting on the ground when i leaned forward and felt a pop in my lower vertebrae. i have minor scoliosis. should i go to dr?

Yes, I would: recommend that you see a doctor, who can examine you and properly treat you. It may just be a minor muscle strain, but you should be seen to be sure.

Varies: Back pain is really common. Many episodes can resolve on their own with no treatment. So if the pain is fairly mild, you might want to give it at least 2-4 weeks with rest to see if it gets better. If it is severe or assoculuated with numbness or pain in the legs or problems with the bowel or bladder, I would be seen immediately.

If it is severe pain: yes. If it is not severe, you can try rest, ice, and otc ibuprofen or naproxyn. If it persists more than a week or so, you need medical attention, mainly to make sure that you have nothing other than pain.