If his temperature, poop and urine are normal, then perhaps it's not a feeding issue. 90-120ml every 2-3 hours is normal in terms of intake; that's how much my first child drank, too, at that age. You say he wants to be carried and he keeps chewing his hands - so maybe he just wants to feel secure. Have you tried giving him a pacifier? You can also just hold him, let him smell his mum's scent and feel her warmth.
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