J.A.
At this age, his needs and wants are the same, he isn't manipulating you. Do not let him cry it out, as he is still learning that you are the one he can depend on and trust for all his needs. Give him the nuk. Is he in your room sleeping? This would be an appropriate time to have him near you. This would also allow you more sleep if all you had to do was roll over and give him is nuk without having to rouse yourself and walk to another room. Sleep is crucial, especially for the adults!
He seems to be needing something when he screams in his sleep for his nuk. At this age, their mouth is their world. It serves not only a means for nourishment, but also a means of soothing. Flutter sucking when nursing is one way babies sooth themselves without eating at the breast.
Read Ask Dr Sears Web site and Night Time Parenting by Sears, it saved our lives when we had our first baby.
This will pass. In the meantime, enjoy your little one. This is a fleeting era.
The days are long but the years are short.
Take care and good luck!
J.