booyoo I shouldn't be glib, this isn't a debate, sorry
it sounds like your baby finds the sucking comforting, that's why I suggest a dummy
everyone is right about the feeding more to boost supply
but it really sounds like the sucking is helpful to him
also it's so exhausting that if he did take a dummy it would give you a breathing space
I remember that feeling when you are so knackered you could lie down on the floor of sainsbury's and sleep for a week, and you can't think straight
IF he likes one a dummy could help you get a couple of good nights sleep so you could work out a new approach, or sense what he's really needing, and also the sleep will help to boost your milk supply
if you've already got one for him, ignore, but if he hasn't, well there is an alternative to calpol and formula