Looking back I'm sure my older kids were like this. I had colicky babies who never slept anywhere but on me for more than 5 minutes.
I finally figured it out with our number 3 because he was vomiting huge amounts all the time.
When I cut dairy not only did he stop vomiting but I had a different baby! He no longer screamed for 2 hours every night. He was content and he actually slept other than on me.
Number 4 I was prepared for the same thing but she is much worse. Before a Ted and cloth her bum was a bloody rash for. The first 4 weeks of her life. If I accidentally eat something she gets sores that bleed and rash all over. She cries and won't sleep. Doing a Ted also identified soy, nuts, oats,eggs,and beef.