DS is 18 weeks. He sleeps well most nights from 7 until 3 or 4am when he wakes to feed. I bottle feed him and he takes around 6-7oz. I then burp him and change his nappy and put him back to bed when he goes back to sleep. Trouble starts about 4.15/4.30am when he wakes again and fusses and moans for ages - ive tried patting which is fine when I'm in there but he cries as soon as I stop. I've tried feeding again but he isn't hungry, ivd tried cuddles, water incase it's just thirst, bought him into our bed but he just wakes up properly. I don't think he's cold as he's in grobag, long sleeve best and babygro but I did add a blanket just incase.Today I didn't get him back to sleep until 6am after another feed and DD gets up about 6.30. Any ideas why he could be so unsettled and what I could do? I don't mind getting up to feed him but the early morning fussing is frustrating for both of us