I Was Suffering From Lower Back Pain In 2009 Which

i was suffering from lower back pain in 2009 which slowly and gradually reduced by 2010 with physiotheraphy,pain killers and rest .My xray reports said that there was reduction in l4-l5 of my spine.Now, again since two months i am suffering the same problem again.Once when x-ray was done it declared that l3-l4 and l5-s1 disc spaces are reduced.I continued my physiotheraphy along with rest for 15 days,and there was only 50% improvement.I again went for an x-ray 2 days before which says that l2-l3 and l4-l5 disc space is reduced.I am very worried as i am 29 years old and have lot of resposibilites.
Please help as i want to recover soon.