Hugs, hugs, hugs! Stay strong! Drink lots of tea! Breathe! You're doing better than you'll ever know!
Firstly, think you should pop to the docs to rule out anything like reflux or inaugural hernias etc my DH had the latter as a bubba and mother in law didn't know till 5 months and he screamed and screamed!
If all is well in that department then I know it's hard but get out of the house as much as poss. My DS had colic bad! and I was in a v similar situation and going to mum and baby groups and coffee mornings etc etc and meeting other mums was fab! It also distracted DS amazingly well! He loves a Costa coffee shop where he can watch the world go by! Lol!
Was he premature? That will drag colic etc things out a bit if he was.
Also get a referral to baby massage! It's a wonderful bonding experience and should help your little one relax a bit!
In my opinion. Ignore the high needs stuff! When you're in the thick of it like you are now that Dr Sears high needs stuff will scare the crap out of you and to top it all off when your out the other end if it you'll prob realise your LO is not high needs! Or even if he is, its not a vad thing
Download white noise app and play it fairly loud when he's in middle of a meltdown it seems to chill my bubba out,
Lastly if he's not too heavy for you get a sling! I was so anti them until I tried a friends in desperation and OMG it was a flipping god send! I got a close caboo sling and loved it!
Hugs x