Baby's weigh extremely slowed down

ch
Hello, my baby was born 8lbs 1 oz on oct 25, when we left the hospital she was 7lbs 7oz but the next day I had her back up to 8lbs again. On Nov 11 she was 9lbs 4 oz at 2 weeks and 3 days old. Then at 3 weeks and 4 days she was 10lbs 6 oz. At 7 weeks 6 days on Dec 19 she was 12lbs 4 oz. She stayed that weight until the beginning of january. Well I took her just to get weighed on Feb 6th at 14 weeks 6 days and she was 13lb 10oz but she hadn't even pooped yet either. The nurse didn't say anything about it and she doesn't have a dr appt till the end of the month, I don't want to take her in until then because of all the sickness going on. She pees and poops pretty normal and is breast fed only. She eats enough I'd say every 3 hours. My family is kind of small so I'm not too worried but I see other women say their babies have doubled in weight since they were born but my baby hasn't she has only gained maybe 6lbs. Anyone else's baby slowed down?