Question

I have a lactation consultant coming to my house on Friday next week but in the meantime I wanted to see if anyone has any suggestions. I have been exclusively pumping for my son because it was too difficult to get him to latch in the beginning. Well he's almost 5 months now and I have been trying to see about getting him on the breast. Well he latches perfectly fine but will move his head around/unlatch every 30 seconds to a minute. He doesn't push away and he'll always take my nipple again but how do I get him to stop this? He never does it with a bottle