he just won't cooperate.

I'm having latching issues with my baby. He has a shallow latch so I'm having pain in my nipples. I've been to the lactation consultant and she said he just isn't opening wide enough. Okay easy fix right...not. She said don't let him on the breast until he opens wide enough. Well 98% of the time he won't open wide enough and just gets pissed and starts grabbing everything in his reaching distance which includes my sore nipple. I'm so frustrated and at my whits end. I don't know what to do to make it better other then what I've been trying but hasn't been working. I ebf my daughter before this for over a year but she latched no problem and I never had any pain or issues with her.