How to deal with colic?

Hellos! How many days it takes for colic to go away? My daughter has been very fussy and crying non stop and hard for many hours at night. She wants to be carried and will cry the moment we put her in her cot or on bed. She only sleeps 3 hours at night and most of the time at night she is crying. #pleasehelp #advicepls #1stimemom #firstbaby