Seriously need sleep

My babies 4 weeks old and I’ve been up with him for the last 3 hours straight. I am at my wits end. He will not sleep in his bassinet and just plain won’t sleep. I am exhausted. Is anyone else newborn not sleeping minute I lay him down he’s making noise or crying. Help!!! I’ve tried every swaddle, laying him down when he’s out cold doesn’t matter he still wakes up.