My DD is 6.5 weeks old. At 4 weeks we introduced a bottle and she took it great. Since then we have given her about 3 bottles per week with no trouble. Yesterday and today she screamed instantly when we treied to give it to her and doesn't stop until I offer her the breast. I have to go back to work in 3.5 weeks so I'm starting to panic a little on how it is all going to work out.