Please help. My dd is 4.3 months and exclusively breastfed. We have tried formula three times and each time, she ended up vomiting violently, until just bile came up. I even tried mixing breast milk with formula today (20 mls Aptamil, 50 mls breast milk). My health visitor says to stick with breast milk when I go back to work in under a month. Get up at 5 am and express. I will not have ability to express in work, long hours, travel etc. Also, I hoped formula would help her sleep through night. She throws up 2 hours exactly after formula feed. Has anyone else had this experience? I am not superwoman, so will not be able to continue to breastfeed when back in work. I must go back to work for financial and sanity reasons.