Hi B.,
I think having 4 children is a great idea - not everyone is blessed with that desire! So, you should - on that note you need to change some things abuot the sleeping habits or you will go bonkers for the next 6 years and not sleep at all or ever alone with your husband. :)
When you give the child something to help them sleep they will get used to having it and not be able to go to sleep on their own. Your son is used to you being with him when he sleeps, used to a night light (disco thing), and music (songs you play). He needs to learn to just go into his room and go to sleep. I would recommend starting to break the habit - he will cry some and throw tantrums, but I think you need to break him of this before your little girl comes along or you will not remember time with either one when they are little. I have twins and I knew that if I did not get their sleeping habits down I would not ever get enough sleep to enjoy them all the time. From the time they were born they slept in their own crib (well, with each other but not me) without a light and with no music or anything to help them sleep. I never made them scream/cry themselves to sleep, but I always made sure they were put into bed when it was time to sleep. They are now 2 years old (just this month) and when I say it is nap time they run to their room and at night I say it is nite nite time and they go in and put their head down and go to sleep. Train them to want to go to bed and sleep without any type of crutch. I read "baby-wise" and "sleep baby sleep" and used what I thought was good for each of my children. I have a boy and a girl. My son (most boys) loves his sleep. My daughter fights it tooth and nail, but will always go down as she knows there is no "wiggle room" to not go to sleep. You are about to have a little girl, so I would be prepared. I think little girls are the most precious babies, but they will definitely be more independent that little boys. Please email me if you want to talk more - I promise I can help you get your babies to sleep. Oh - also, neither of my babies ever cried when they woke up to eat, they just woke up and made sounds. They were not afraid of the dark and they trusted me that i was going to come get them, so I never had to wake up to crying! That was a blessing. My son started to try that, but I worked him out of it. email anytime through this listserv and I can give you my personal email too.
S.