I'm so exhausted and feeling a bit fed up as my 12 week old was sleeping around 5/6 hours at night followed by more shorter chunks but now he is waking much more frequently (within 3 hours or so of bed and then every 90 mins-2 hours for the rest of the night) and I'm not sure why as I'm breastfeeding on demand so I don't think it can be hunger. He seems windy when he wakes in the night and will fart but winding him doesn't seem to make much difference. I'm so tired. Does anyone have any tips? Thanks