L.M.
Good luck N.! 6 weeks to about 8 weeks of age is usually a high colic period in babies. Use mylicon drops, pump her legs up and down to help her move the gas out, rub her belly, do infant massage with baby oil on her. Warm baths help. And she should go to sleep earlier than 10 pm too. She may be overtired on top of being gassy.
You know having had other kids that this will pass. Some babies are colicky and some are not.
This too shall pass! Good luck to you...I have a 3 month old, 3 yo and nearly 5 yo.