我個BB normal ma?

樓上已經答得好好。
依你BB既食量好好啊。依家咁細係食飽訓，訓飽就食架啦。
最緊要食飽幫佢掃風。
BB成日喊有好多原因，佢地肚餓會喊，熱會喊，唔舒服會喊，嚇親會喊，想人抱又會喊。但聽你講佢食得訓得，應該係冇問題，如果你抱起佢就唔喊就即係剩係扭人抱。平時就唔好成日慣性抱住，食飽掃完風或訓左覺就放番落床，抱慣左你一唔抱佢就要扭人抱架喇。當然你要時時留意住佢，例如有冇比被焗住或者有冇其他不尋常等等。仲有一樣，不過唔知你信唔信，就係如果帶佢出街要同佢講而家去邊度呀、做咩、見邊個等等，上車落車番屋企都要同佢講，就算佢訓左都要同佢講，如果唔係佢番到屋企果晚特別扭計。不過佢仲細，非必要都唔好帶佢周圍去。呢d係老一輩講既，信唔信就見仁見智。
至於樓上所講既老人家話百日哭，聽人講多數係夜晚先喊，當然你如果真係擔心，身邊又冇有經驗既親朋戚友教路，最好帶BB睇下醫生問問意見囉。
其實照顧BB真係有好多學問，要睇多D書，上網搵下資料，問下其他媽媽意見，樓上講果個網址係一個幾好既資訊平台，我都係member。仲有好多其他媽媽會、bb會，上網搵下睇下就會學多d，知多d架喇。

For the weight - it is good.
For the milk - you said 3-4 oz, but you did not say how many times a day. If the baby takes 5 times, it is okay.
Sleep a lot is good for baby to grow. no problem.

Crying is a normal behavior to a new baby, the old people say this lasts for 100 days. My 2 babies had this behavior (they are now 1 year and 3 year), it will be better soon. Be relax, the baby is normal. Of course, if you are worry about it, go to consult doctor.

If you do not have enough experience, you can ask for some experienced mothers, or read some baby magazines or books. There are many free resources in HK public library. Or you can go to the web site http://www.baby-kingdom.com. there are forums and experienced mothers who can help you.

Hope this help and God press your baby and family.