I have a 6 week old baby, exclusively breastfed. We got off to a tricky start with slow weight gain and we had thrush. Things had improved but he has started behaving strangely whilst feeding. After maybe 5 mins, or less, he becomes very restless, flailing his head around, straightening out his body, repeatedly losing latch, sometimes sucking the nipple back in. If I take him off and try to burp him he screams and continues to straighten his body. If I put him on that side, or switch sides, the same happens. He may posset milk but continue to be unhappy. It also takes a long time to settle him to sleep, making nights especially stressful. Any ideas? Thanks!