Pear colic is a nightmare my first born literally screamed solid from day 6 till 3 months it was awful and we tried everything but nothing worked , he never slept and I had to wait till he grew out of it which most do by 12 weeks when guts mature
It was horrible to watch him night after night crying in pain and kicking his legs about
Somethings that did help a small amount was a warm bath in a tummy rub and baby colic massage of his belly which I learnt
Not going to lie though 12 weeks of no sleep was a killer. I remember around 2-4 weeks thinking I can't cope anymore with this but it was just a blib you do just solider on
My husband left for offshore when he was 3 days old and never returned till he was 5 weeks so I found it hard night after night dealing with a crying baby alone.
So yeah to me colic is bad so you have my sympathy , I hope your little one perks up soon,
There is various potions from chemist you can try, colief, gripe water, infacol, a few different herbal powders etc.
Speak to your HV and she might advice you on something to try.
We had no luck with them but all babies are different
Good luck