My son is 6 weeks old. Over the last few days he has decided that he can't open his mouth to latch on. I end up with a terrible latch and a painful nursing session every 1-2 hours. On the rare occasion that he does latch well he ends up spitting out most of my boob so just the nipple is in his mouth anyway. I've tried different positions and I relatch him a ton before I just let him eat with a crappy latch. It's always worse on the right side. Any suggestions?