What your explaining is a side effect of colief. I'd still see the doctor again though x
Found this on the wesite:
Does Colief® have any side-effects?
When babies commence taking milk treated with Colief®, there may be change in stool pattern. The stools may then resemble those of a breastfed baby, ie looser and more frequent, even if formula feeding. If you are happy that the baby is otherwise well, gaining weight and urinating normally, there should be no cause for concern. If the drops seem to be working well, you might try reducing the number of drops used at each feed.
If you have any concerns regarding your baby's health, you should consult a Health Care Professional as soon as possible.
xx