Help me out!!!!?

ok well i'm home alone and i have my babii here with me and he keep cryin and he won't stop!!!! my mom is always here to help me but i'll be home alnoe for 3hours! and i don't know how to handle my own babii! he screams at the top of his lungs please! i feed him and i changed him! i need help please! What is wrong wit my son!