I am fostering a very young drug withdrawing baby. Over the last few days the baby has become more and more distressed at every feed and for an hour or so afterwards, it doesn't help that baby is only opening their bowels every 72 hours or so, we have seen the GP today who has prescribed lactulose but that is going to take a while to kick in. I am feeding as upright as possible and keeping upright after feeds but still the gulping and possets are happening. Is there anything else I can try?