My 2 months old baby suddenly dropped his milk intake.

My 2 months old baby suddenly dropped his milk intake after the 6 in 1 vaccine jab. He was on 120ml every 3 hourly but now, 80ml every 2 to 3 hours and sometimes even stretched for 5 to 7 hours for next feed (90ml). While he is pooping and peeing, active and playing when awake, I'm kind of concern the sudden change and wonder if anyone is experiencing the same? #advicepls #momcommunity