I've been having intense lower back pain that causes me extreme discomfort. It feels like there's a constant pressure in my back and I can't get rid of it. It comes and goes randomly. I can still move around freely and bend over and such but it keeps me up at night and I can't sit without shifting position every few minutes to relieve the discomfort. I'm only 18 so I still go to school and I carry a heavy backpack so maybe that's the cause. It's been happening for over a year now and I've learned to live with it. But I haven't gotten it checked out ever.