One of my 11 week old twin boys has been suffering with constipation for a while now and nothing seems to be resolving it. At first he wasn't having a bowel movement and for 2 days and now that has increased to over 3 days. As time goes on he becomes more upset and visibly uncomfortable with all the straining and when he finally managed to poo it's very soft so not sure why he can't pass a stool. We have tried probiotic drops (he still takes them), fennel tea, we changed to aptamil comfort and then 3 weeks ago we changed to Aptamil without cows milk protein as the doctor suspected protein intolerance. In the last week we have tried a dose of Lactulose which works but isn't really something we want to keep giving him. We'd like to find out the cause but the doctor seems to be out of ideas. The other twin is fine. Has anyone else had this with their baby? Thanks