Is it Normal To Gain more Supply in One Breast than the Other ?

Ive been breastfeeding its only been 6days i had my Daughter, Friday Dec 15th so I’m so New to breastfeeding and want to do it as possibly long as i can i don’t want to introduce her to formula so , I’m Doing Both Breast and pump i Breast First then pump . I always Alternate Breast sometimes I can’t because she Falls asleep so one is not always getting fed on until she wakes up for her next feeding and then is fed off the one she didn’t get too . So is it normal that when you pump one is supplying more than the other Breast. & yes i am Drinking lots of water keeping hydrated!