So I was successfully breast feeding up until around 2 days ago where my supply has completely changed and I can't hardly express 2 bottles yet alone the amount I was doing before that ..breast feeding is not working as my nipples have gone flat ( tried the shields ) they arnt working for me and baby so I am left with no choice but to change to formula as I have 2 bottles in the fridge and I cannot get a drip of milk out of my boobs.. will this harm baby being changed so suddenly ? I'm so worried and all round heart broken that I have to stop this .. I understand I can contact certain people for help but that doesn't resolve my issue of having no milk for today's feeds