Can you get an Ergo carrier or another one like this? Sell the Bjorn to some other unsuspecting person. Lol they aren't good for anyone :/
Have you got a swing? I have a few friends who couldn't live without one with their babies.
He sounds just like my first. I didn't have a swing or a carrier because 16 yrs ago those things weren't readily available to me. Luckily for me I had my mother just about living with me doing everything. Sadly not everyone has that luxury.
He will get upset if he's crying yeh that's ok though, he won't break or suffer any damage if you're just making a sandwich or going to the loo.
If you purposely left him to cry for over ten mins yeh he might get some damage, newborns can't cry it out, but that's obviously not the case.
Maybe also google high needs baby, at least you will know you're not alone.