C.C.
HI K.,
I had the same problem with my 2nd. My husband found me a very part time job right after she was born to help prevent PPD, which I had after my 1st was born, and I would leave her with my mother while I worked for a mere 3 hours. When I dropped her off she was happy and when I took her from Nonna she was happy but my mom were swear she screamed the whole time and would refuse to eat and I was also pumping and using formula for that. I refused to believe my mom until they brought her into work for me to see for myself and the best solution we came up with was I just had to quit. The crying was way too stressing on my mom to deal with and for the measly pay I was getting it just wasn't worth it. The anxiety did ease up over the next few months but I'm pretty sure she was about a year old before it went away altogether. I don't know what causes it I just know it was something we had to wait out. Somethings that did work for us when I had to leave her with a sitter was a bouncy chair that vibrated or a baby swing, for some reason she just loved those things and they would soothe her for a while, we also got her a really nice blankie that's soft on one side and satin on the other and that helped her have some security. She did eventually take to a bottle and it was those fat Gerber bottles with the bigger silicone nipples but the ones that look like the playtex nurser nipple where its inverted some at the top, not the rounded ones that come on the bottle. I hope that helps you some. Separation Anxiety can be so hard to deal with and I hope you can work something out so you all don't have to be so stressed anymore. Good luck!
C. C