Baby is very fussy

Since newborn up to 1 month,she drank fm and bm milk without a problem at all..however when she turned 2 months old,she started to be very fussy with milk till now.I did bring her to see specialists but they could not do anything...the doctor said that she has colicky and also mentioned to try changing the milk but did not recommend me any milk brand and what milk to change.. Her first milk was NAN and no poop ? for 3 to 4 days. Second milk was also NAN,she did poop Everyday but she didn’t like the taste of the milk. So eventually we changed to Lactogen but her poop was very watery. Therefore, we decided to change to Friso gold.She poop everyday but she’s still fussy. ? Sometimes she don’t want to drink milk even up to 7 hours. Can anyone share with me what kind of milk your baby likes.What should I do so that my baby could drink milk as per normal without any difficulties? I’m stress out because she is 7 months old but thankfully she loves baby foods. It would be a great pleasure if you could help me.?