HELP!!!!

OMG I am loosing it with my little one. First off he is throwing tantrums every second. I don’t understand him anymore. It’s like he is always angry. He is also always throwing whatever is in his hands. He doesn’t let myself and his brother enjoy ourselves. If we are sitting and I move he will cry, everything is crying. I am so frustrated. And did I mention he has stopped eating anything except for milk. I really need some advice. I don’t know how to handle home. I just need even an hour of peace