Sleep training

My daughter is almost 6 months and we started sleep training last week. The first 2 nights she did not cry. However, after that she would cry and whine until she goes to sleep (usually takes about 10 minutes). I noticed today she is crying even more and were now a week into training. Is it not working? I thought the crying is suppose to subside, not get worse 😔 any tips would help :(

Ps. Also like to add that as soon as I turn on the white noise she will cry 😩