Oooh I'll probably repeat loads already on here as I haven't been able to read all the posts, but a few immediate thoughts:
CHILL OUT. Babies who scream all the time won't do it for ever. And if you can't seem to stop them from screaming, IT IS NOT YOUR FAULT. And, if the only way to calm your screamer is to let them sleep on your chest/rock them/go for a walk/give them a dummy/feed them to sleep, just DO IT and IGNORE the "rod for your own back" brigade.
Even if you do manage to create any "bad habits", hell, you can always re-train little one when frankly you're not feeling like a hormonal, sleep-deprived zombie.
Try to enjoy it, but don't feel guilty if you find that hard. And get/accept help if you feel wobbly or you can't cope.
REMEMBER that all the difficult baby phases will pass, so try to focus on the nice baby phases, because they too will pass! Both types of phases will just give way to more, but different, bad/good phases!
There is absolutely no rule that states if your first baby was a screamer, number two will be "easy".
Breastfeeding does not necessarily just happen naturally.
Take loads and loads of videos and photos because it is truly amazing how much of those tiny details you forget.
Big up us mums, we are great!
Shereen