I had one with colic and have had 2 grandkids with colic.
I remember my daughter screaming and pulling up in a ball, like she was in horrible pain. It was like she had gas that she couldn't expel. If she did pass it, she'd relax and be quiet ... for about a minute, until the next 'bubble' started. But usually, she just couldn't pass it. My little one had it from 7:30 am until 10:30 pm, every day. Incessant screaming. I talked to the doctor and he was of no help. My daughter says that the Mylocon(sp?) drops for gas help with her children for a little bit. When my daughter turned 3 months, it was like a faucet turned off. She was a different child. Pleasant, smiling, a great baby! So, there is light at the end of the tunnel. Also, my friends and I (all of whom have had colicky babies) have a theory. We think that those children grow up to be better academically. All of the kids I know who had colic are very smart and have (have had) no trouble in school. One thing I did for sanity's sake. I would feed my daughter, change her diaper, make sure she didn't need anything, and let her cry fore a while in her room with the door shut. I turned on the vacuum in the hallway trying to drown out some of the noise. Good luck! It's worth it all!