My first son had colic and he usually had his bad time every night, be thankful she has good days. My second son is 7 weeks old. We were told he had colic, come to find out he had reflux and was put on medicine and is doing well, tell her about reflux and see if she has any symptoms, I read on the internet that alot of infants are diagnosed with colic but they have reflux. If she doesn't have any symptoms and is bottle fed try Nutramigen formula. It is expensive but it seems to work for alot of babies.