4 Months Old Super Cranky

Any mummies here experienced an extremely cranky baby when hits the 4th month milestone? Her milk schedule went haywire, from the usual 3.5 hours to 2 hours/3 hours resulting in drinking lesser each feed. Waking up earlier than usual cos of hunger (3am drank 130ml, 5.50am drank 70ml). I'm suspecting teething as she's eating her hands like mad and drool more. Will teething causes irregular feeding, clingy and hunger too? She seems sleepy too but keep fighting sleep ?