Refusing to nap

Amanda
My 9 week old son refuses to nap. He yawns and gets tired, I rock him to sleep, lay him in his crib and a couple minutes later, he's wide awake. 
I've tried to let him nap in the living room with me but I think it's too bright. So I put him in his crib in his room which is very dark and always have lullabies playing since he wakes up super easily to silence. 
I can't figure it out. He fights sleep all day and keep himself awake and eventually gets to a point of such exhaustion that he cries and screams and is inconsolable. 
Anyone else have his problem? Any tips on how to fix it? 
I asked the pediatrician but she didn't give me any useful information.