Is my daughter the only one?

I see all of these posts of babies eating “all of the time” and “for so long.” But, my baby only eats like 9 minutes TOPS on one side every 2-3 hours during the day & 3-4 hours during the night. She has about 5-8 wet diapers a day, and usually has one bowel movement (she’s breastfed). She’s 7 weeks tomorrow. She isn’t gaining a lot of weight, but she hasn’t lost any either. She’s gained about 6 ounces in the last two weeks. I was just wondering if she is the only one who doesn’t eat for a long time. I wish she did so I would know for sure she is getting enough food!! I worry about her constantly. Any words of encouragement or just someone to say their baby is the same way so I don’t feel so alone...??