gas/colic

What's the difference between gas and colic ?. Immnot sure which one my baby is but what did you do to help ?. What drops did you feel helped ?. My baby has been in pain from gas since I've brought her home and nothing has helped so far . I've tried to different gas drops down that didn't work ether . Even changed her bottle more than once  . What to do other a gassy/Colin baby ?