DD is nearly 6 weeks old and goes down well at the beginning of the night (currently around 10pm) then wakes for feeds fairly consistently at 1am, 3/4am and 6/7am. She sleeps fine until after the 3am feed when she becomes really grumbly & groany. She seems asleep but really writhes around & only stops when I put her on me so she's more upright. I thought for a while she have reflux & tried gaviscon infant but this seemed to make the situation worse as she became constipated. If it was a sporadic occurrence I wouldn't mind but it's the fact that it's the same every day - is it normal or could it be reflux/wind/something else?