I am breastfeeding my 8 week old baby and it is generally going ok, my only worry is that he only feeds about 10 minutes on one side every 3 hours - is this enough? His weight has been fine up to his 6 week check up but now as he isn't getting weighed weekly and as he is getting bigger I worry that he should maybe need more? He will sometimes take more if I keep offering but then seems to be more sick. Any advice would be greatly appreciated!