My baby is almost 6 weeks old and does not...?

Are you feeding or using a formula? If your feeding try and stay away from the same foods that make you gy. If your using formula, sometimes the iron in the formula can cause constipation. You could always try using infant gas relief drops and make sure to burp her after every once or so when feeding. One BM a day is normal as long as she isn't straining or appears to be in pain when it pes. Congratulations and hope this helps!