Help please breastfeeding mummy's

Kelly • Wife to a wonderful hubby and Mummy to four gorgeous boys and three angels
So my Lil boy is 10days old and is breastfed. Just wanting to know if him feeding for 5mins on one breast every 1/2hrs is normal? I am a Lil worried as he was going 15 mins on one having a break of 10/20mins and doing 10mins on the other and now seems to be 5/10mins if I am lucky on one and then sleeping for over an hr and feeding 5mins from the other and sleeping. Was told he needs to feed a total of 20mins each time because of his jaundice but he just won't wake for more I strip him, tiggle him and blow in his face and nothing. I have health visitor round today and tbh I don't really like talking to them about problems as they are too judgemental and have midwife Friday afternoon to ask but wanted other breastfeeding mummy's help xxxx