My daughter hasn't had a BM in 2 weeks

I exclusively breastfeed my baby girl. She is only 4 weeks old and hasn't pooped in 2 weeks. Her 2 pediatricians and ER doctor said it's normal for an EBF baby to go days without a BM. I read EBF babies can go up to a month without a BM. Her stomach is not hard, very gassy, no discomfort and no throwing up. she did this at 2 weeks old went 3 days without one filled up her diaper then hasn't gone since. We did bicycle legs, baths and rectal thermometer. Any other EBF mothers out there deal with this and if so how long is too long not to go? Also I'm not a big diary fan so I know that's not the cause.