Dd is 5 weeks old and exclusively bf. She has been slow to put on weight, but hv is not concerned and seems to have checked her thoroughly. Dd suddenly went 4 days with no poo, got increasingly uncomfortable, then did a huge poo. She immediately seemed more comfortable and was fine for a day or so, but no more poos. She's getting uncomfortable again and is clearly in pain. She seems to have been very gassy. Do I need to worry, or is this just normal. I have 2 older dcs, but have not had a baby so clearly in pain all day before.