i've been mixing breast and bottle feeding because i couldnt keep up. but the last few days eva has been sick loads after feeds and now i think she might be constipated! she hasnt had a poo since yesterday morning and tonight she is straining and going red and then screaming like she is in loads of pain. i feel so bad for giving her fomula!do you think it doesnt agree with her?? its horrib;e seeing her in pain.