Hi... My baby is 1 week old and it's not laching. So I'm currently using breast pump to express milk and I'm able to express only 40 to 50 ml of milk only from left breast as my right one has become hard and I have used hot patch, hot water bag and all but none of them helped. Is it OK if I express milk from only one breast? And also if I'm using breast pump will it reduce the milk quantity? Please help.