Shez I felt that way when Charly was around 4 months, have you tip the Tommee Tippee bottles there the only onces Charly will drink from. But I was lucky Charly wasn't losing weight, think she was just drink so quickly.

I also make sure I take a couple of glasses of Activital (hope that spelt right, in supermarket next to Milo) a day, its a chocolate drink like Milo. I notice a difference the next day if I miss a glass. I would start with 3 to 4 glasses a day, there is a milkshake recipe on BB in the breastfeeding section for Activital, they may have some other tips to.

I also heard if you express even for five minutes with nothing is coming out it will help your body produce milk, as it is like a trigger.

I would keep persisting with the bottle it took Charly a while, and I have heard since that you should use the same bottle until they take it as just a matter of them getting use to it.

May be try her with some farex, I asked my doctor when I thought I was low it the afternoons and got the ok. Charly preferred mixed with BM, I only gave it to her when I was low once a day. Maybe Issy would like to start on solids, a few mothers in my Mother group start there child at 5 months.

Hope this helps you.