I know you really want to comfort him and hold him until he's asleep again, trust me I have been there. You do need to soothe him but you have to set him back down after he's calm. I know this sounds brutal, he needs to learn to self soothe. I have a 3 year old who has woke screaming and crying every night of her life, repeatedly. She has bad dreams and also eczema. She would be itchy in her sleep, clawing and scratching. Now that she's older she tells me she has dreams of alligators biting her. I potty trained her extremely early and that did seem to slow down some of the waking, but obviously your sons too young for that. By holding him he will always need that comfort from you. He can become dependent on you for sleeping, you are essentially establishing yourself as his favorite "stuffed animal". You need to still talk to his pediatrician, he may be having issues with the formula or your milk. You can message me if you need to vent, support or have questions. I am a pro at not sleeping for the sake of my child, she still wakes every 2-3 hours and she actually takes medicine to sleep now.