Probiotic drop

L.
My LO is almost 10 weeks, she having acid reflux and colic so we starting give her Gerber soothe colic drop to her formula 2 days ago, since she is taking the drop ,she want to eat more and more then too much so she spit out. 
We talked to her Dr before we gave her the drop or not and Dr said we are free to give to her the drop.....does anyone LO taking the drop and hungry like this? Should we stop it?