Why?

Why is it that as a parent you are constantly questioning the decisions you make? When if ever do you get the confidence that what you are doing is the right thing for your child? Or do you? I know we should not compare ourselves to others but everytime I look around at other Mommies around me I feel so insecure with my own ability to be a good mother. I know in my heart that I am a good mommy - I really try to do what is best for my son at all times. Sometimes though I wonder if what I have decided is really the right thing? Here's an example - for some reason going to sleep on his own these days has been hard. I have consistenlty done the same routine every night with him since he was about 6 months old (maybe even earlier) - we have a nice fun bath, we read books, we sing some songs and then it's time for jammies. Tonight he even told me that he was ready for his jammies and was ready to go to sleep. First time he has done that! Still I got him dressed, gave him hugs and kisses, tucked him in, told him I loved him and all that wonderful stuff and left the room. What happens then? He cries and cries - now tonight was better than last night where he screamed, but still tonight he cried and whined for about 20 minutes before going to sleep. I read that it is a phase some kids go thru and it will pass in time but that really doesn't make it any easier on me. Honestly it breaks my heart but I don't want to keep giving into him (which I have done) because when I do it seems to get worse. I think it's important that he know how to fall asleep on his own. Yet I still continue to question my own decision. I know I can't have it both ways right?! I guess it just hurts to hear my baby cry. I probably just need to work a little harder on having faith in my own decisions and my ability to be a good mother. I'm not perfect and never will be but I will always do the best job I can for him.