Can I check is it a must to wear nursing pad to prevent leakage ?

It varies from person to person, to me I felt padded nursing bras are enough to overcome milk leakage instead of using nursing pads. I bought 3-4 boxes but ended up using only 10 pads in the initial 2-3 days. If you are at home, then just padded nursing bras should be sufficient. For some mothers the milk leakage is too minimal as the baby feeds every 2 hours or mother pumps every 3 hours. The body itself tunes itself to produce just what is needed.