Week 5 to week 6 changes

Towards the end of week 5, I started to look for food in midnight. Sometimes even i felt so full for my dinner, or I had a bread before bed. I still gotta get up at 2/3am to eat, or else I will b feeling nauseous and couldn't slp. I had bloated stomach and heartburn. I cant finish my meal, but I do get hungry easily. So I only can take small portion and kept on snacking throughout the day at work. Due to heartburn, I avoid fried food and spicy food. Due to diarrheoa, I avoid milk. I feel my belly button is tight? Some pulling feeling when I stretch my body in bed? Anyone? Sometimes it is itchy too. Tell.me yours.