Feeding Gone Haywire ??

*Yawnz* After the jab on 18th Apr, BB Caleb's sleeping hours and feeding become abit haywire. Previously, his bedtime is from 9.30apm to about 4am. Then he will wake up for his milk. But for the past 2 days, he is waking up much earlier. Today is the worse. He woke up at 1.30am and 6.20am for his milk. Wah totally shack out man. My colleague said we can try to wake BB at about 11pm for another feed. We will try it out tonight.. update u guys on the situation again