I have a 10 month and he has been on 3 different formulas. SMA made him constipated, then I put him on Aptamil which was lovely but kept him wake 24/7, so I'm now on cow and gate which is great and he sleep but always being sick. Do you think it's time to see the GP to get the right feed? This night has been the worse, being sick especially 2 hours after feeding. I'm just running out of ideas on what to give him. Has anyone else had this trouble?