Your information regarding lower back pain is insufficient. According to you one and half year back you were having caesarean section. Most probably the reason of lower back pain is due Lumbosacral strain secondary to calcium deficiency which is more common in breast feeding Indian working lady. Need investigations like X-ray of Lumbosacral spine AP nad LATERAL view along with serum calcium and Vitamin d3 level. Lower back pain can also due to urological problem. Pain in lower back region may also due to working habbit which is not explained.

Core strengthening exercises Hip strengthening exercises