My LO is almost 8 weeks old and for the past 4 days has been eating constantly from about 9 pm to 3 am. When she isn't eating she just screams! Nothing but nursing is keeping her calm. She's had some pretty bad gas lately but she'll keep crying after passing gas or a bm so I don't think it's her stomach. Any thoughts or advice? We see the pediatrician in a week but I'm not sure if I should get her in sooner.