How old is the baby?
Our son was colicky for 14 weeks, and just like everyone said, the colic abruptly ended right around 3 months.
We tried everything (and not just once...we gave it a fair shot) from swaddling to shushing to swinging to side-laying to the drops to the car rides to eliminating everything 'bad' from my diet. Nothing mattered. Nothing really worked. He just liked to scream - from dawn til dusk. Lucky for us, he did sleep well at night.
The most annoying part was the people who would say "he has reflux, he's in pain, he's hurting, he's crying for a reason, you're an awful mother for not doing anything". Um, hi, don't you think I took my kid to the pediatrician and get everything thoroughly checked out? Of course I did - no one enjoys a baby that screams every waking minute. Some kids are just colicky.
On the bright side...the terrible 2s tantrums have been a cinch. At least I now know why my son is throwing a fit! Because I listened to nearly 3 months of constant screaming, the tantrums are a piece of cake to listen to.
I tried all the 'tricks and techniques' and unfortunately for us they didn't work. I started counting down the weeks and sure enough at 14 weeks, it stopped. He was a completely different baby. Hang in there; I know it is really tough but realize that colicky babies are not unhappy babies for life (I know this for a fact; my son is an absolute joy). Make sure to take some time for yourself and give yourself a break because the constant crying can really wreak havoc on your sanity.