Alamak mama, I can totally feel your stress, a clingy baby on top of four others is legit exhausting and you're doing better than you think! Since your little one's tummy, poo, and feeds all look good, this is very likely just a phase (some babies are just like this, especially around this age), but do check with your paediatician just to rule out silent reflux or any discomfort that's not obvious. A few of us mum friends noticed our babies around 6-8 weeks suddenly became more needy, one swears it was the developmental leap kicking in, so you're definitely not alone and definitely not failing. Please be kind to yourself lah, you've got FIVE kids and you're still showing up; that's incredible.