He is only 3 months old. Do not let him cry it out at this age. When he is crying he needs you. I am all for cry it out when they are older, but at 3 months they just need comforted, fed, or change, or rocked back to sleep. If he is really gassy and irritable etc. try elimination an diet. My sister just found out why her son has been miserable for the past year, he is allergic to wheat and gluten. My son was irritable and slept horribly for the first 3 months until i stopped drinking milk. Also try mylicon drops. 3 months is a growth spurt stage so feed every three hours or so. He sounds like a normal 3 mo old baby to me. Cry is out is not meant for 3 months old.