Please help! I'm going nuts!

Ok so I have a beautiful baby boy who turned 1 on the 5th. Well within the past 2 week he's been crying/screaming constantly. At first I thought he was teething but now I don't know. Normally he'd sleep through the night but he's been waking up during the night screaming 2-3x a night. During the day hell start a fit out of no where. This morning I was feeding him is oatmeal as usual. I put the bowl down for a second to help him with his sippy cup and he started screaming and crying. It took me 20 minutes to calm him down enough to finish his breakfast. I don't know what's going on. My heart breaks everytime because I don't know how to make him feel better. Any ideas?