Desperate advice needed!

DD is nearly 2 weeks old and I'm very cencerned she isn't getting enough milk from me. She not put on any weight since she was born and I am having another midwife visit on Tuesday to get her weighed again.

I have been expressing between my 3 hourly feeds in order to increase my supply for the last 3 days and tho they feel a little fuller earlier, they are not as full as they used to be.

Also this morning to give my nipples a break I decided to express. But I only got 30mls!!!!! And that was after a feed 4-5 hours ago (I demand feed at night).

Also, she hasn't had a proper bowl movement for over 24 hours. Sometimes there is a little bit in the nappy, but again, no where near as much as the early days.

I'm afraid I'm starving her!!!!

How much should she be getting (midwife said roughly 100mls per feed based on her weight), how much longer is it going to take to increase my supply?

I don't want to go to bottlefeeding, but I will if I have to.