I am so so sorry. It’s so hard.
I had a borderline colic, and what “helped”:
Get some foam earplugs so that when one parent is “on duty” the other can sleep. You really, really want to avoid having BOTH parents awake in the night for any amount of time. You’ll burn yourselves out. We use these: HEAROS Xtreme Ear plugs - Best In...
https://www.amazon.com/dp/B000NP79YM?ref=ppx_pop_mob_ap_share
Gripe water. This is NOT a miracle. But it will cure hiccups, and we sometimes found that it just interrupted the wailing for a few minutes (I think he liked the taste) enough that he’d have to rebuild back to full wailing, and sometimes in that process, we’d be able to get him to fall asleep.
Mine did better upright. The mini baby bjorn worked well, her nap on a walk better in that than in the stroller.
Tight swaddle. We used the SwaddleMe Velcro swaddles, and a loud sound machine, but neither of those is particularly outside the box.
Mostly though - time. The only way out is through. Also - when you read advice and then you do it and it doesn’t work and everyone says this is so great and it must be ME I’m doing it WRONG. NO. It’s not you. It’s the baby. You’re doing great. You’re a freaking warrior.