Hi Desirae,

I have worked with MANY kids at that age, and what you discribe sounds really normal to me for a child at that age, if he was 6, well I would say something different.

First you want to rule out anything medically. Have you talked to your doctor about this? There could be caused for the outbursts, gas, food allergies, etc. So I would take him to the doctor just to check everything out .
If everything is fine, I would just say your little guy is having trouble expressing himself and the yelling helps reduce his stress of not being about to communticate about it.
Someone also suggested that it could be that they are tired or hungry. Sometimes they need more sleep or food if they are going through a growth spurt.
I think what you are doing is fine, but it it doesn't work, he isn't too young for a "quiet time" of like 2 minutes or so. Does he still nap?
I am sure you know most of this stuff, it is just finding the right thing to do , but sometimes nothing works, that is the thrills of being a mother. LOL So just scream along with him. LOL Just kidding! ;-)