Sick and allergy or just sick help please

[Abymol]

Hi all

I just started d/d2 on cows milk after a few days she started acting uncomfortable afterwords and projectile vomiting only with milk feeds. Dr told me to keep her off dairy for 2 weeks. She hasn't thrown up her soya milk yet but has slept all morning, but then so has her older brother who is two it's 12 o clock and they're just coming back to life. Oh ye vomiting was getting worse over 3 days. So is it illness only she vomited with or milk and coincidently cought something. Please give advice

Thanks

My son was really ill with diarrhoea and vomiting when I started him on cows milk however he wasn't intolerant it was just a shock to his system, he had been on ordinary formula milk from the age of 6 months so obviously not allergic, the health visitor advised to give him lots of milk based meals such as rice pudding and custard to get his body used to it, I also mixed his formula with cows milk gradually increasing the cows milk and decreasing the formula, he is now fine.