I started FF my DS 2 weeks ago (he is now 5weeks old) due to both of us having thrush and me not producing enough milk for him so he was always hungry and to top it all off i got the flu. I put him on SMA Gold which was fine while we were combination feeding, but now that he is only on the bottle, he is suffering rather badly with constipation. I tried SMA comfort out of desperation but it made no difference. I was told in the pharmacy that i can change between the 2 SMA products without "weaning" him from one to the other now im doubting that aswell. Does anyone have some advise?? I feel guilty as hell and really need a break from a crying baby.