Is it my milk?

Lauren
My 3 week old screams and cries after every feeding. I only bf and I'm a first time momma. He is definitely not hungry -- he won't suck on my finger or anything to soothe him. His diaper is clean. He's probably tired but won't calm down long enough to fall asleep. I try rocking him, singing, bouncing, everything. He doesn't just cry though, it's like he's trying to escape my arms my any means necessary. I don't know what to do. I don't understand what is happening. Please does anyone have even a partial answer for me?