Hello all, I have realised that I don't have e...

Hello all, I have realised that I don't have enough milk for my baby girl whom is 8weeks old. I have recently put her on formula and she's been taking the bottle and formula well :D BUT my boobs are still being engorged every 12hours or so with bulk milk. They are very painful and I think it might be mastitis :( Has anyone one been through this before and what can I do to stop the milk? Please help, any advice is appreciated. :) :)