Please help!!!

Hi, I am pumping for my 8 day old daughter. Her pediatrician said to give her vitamin D DHA daily in her milk. It says on her paperwork 1ml by mouth daily. So I added 1ml to her 2oz of milk & it made her so sick. She threw up the entire bottle. I am just curious if anyone else has added this to their milk & had this problem or if they gave it to them differently? Thanks..