What Causes Vomiting In An Infant Post Formula Intake?

Hello doctor My baby is 2.5months old. Wen she was 2days baby she was fed nan pro 1 as breast milk was not sufficient. After 2-3 days she was completely on my feed. Now again I have tried nan pro1 and she vomited. Even I tried lactogen but she vomited tat also. Is it that lactogen and nan pro1 are not suiting her? Can u suggest alternate option while traveling?