One month old grunting himself awake

Meg • Baby Boy coming 3/2/2016
My son is a month old and will usually do a 9 or 10- 1 stretch at night then recently has been up for an hour then back to sleep for only an hour until 7 or 8. The problem seems to be he is straining, grunting and thrashing after only an hour of sleep. He is breastfed if that makes any difference. I need help!!!!!!!!