Babies put on approximately 30 gm/day, that way your baby very much underweight. You need a proper consultation to sort out things as early as possible

Babies lose weight in the first week of their life; they regain their birth weight by the 10th day, then they start gaining weight. Her weight is slightly on the lower side. There could be many reasons for that. One could be that you are switching between both breasts too frequently and are not letting your baby get thick hindmilk (responsible for weight gain) which comes in after few minutes of suckling. I would suggest you take a proper consultation for feeding related problems. Babies pee 6-8 times a day, which is normal. Babies cannot poop for a week or even more than that. If the baby is comfortable, you don't need to do anything, but if she arches and strains, you can give glycerine suppository.

something  is definitely  incomplete  in your history  10 times urine  by a breastfeed baby means breastfeed  going well...  kindly take a teleconsultaion  on urgent basis. you should  discuss it with  the  pediatrician

The weight gain is negligible... How many times are you breast feeding ? Are you giving any artificial feeds ? Urination and stools part seems ok... Main concern is the not gain in weight.. please consult a Pediatrician for workup.. thank you