N.L.
With my son (now 10 months) I nursed for the first 3 weeks, at which point I wasn't producing enough and I had to stop. We tried normal milk based formula and it caused hours and hours of crying, gassyness and a lot of spit up. We tried gentleease and it did the same. He finally ended up on Nutramigen which worked great. However, that is when we found out that it takes about a week for their little bodies to full adjust to a new formula. With your daughter, if she is eatting well for you and it just seems to be the sitter and your husband that are having problems, it may just be seperation problems. Also, from my understanding (and the way my son reacted to formula) I think that breast milk is sweeter. She may not care for the taste much after four months of nursing. I would say try to wait it out. Give her a week, week and a half and see if the crying eases. If not, then I would call her doc and see what they think. But, really, go with your insticts. If you think that there may be a problem with the formula, it never hurts to call your doc anyways. Best of luck to you and your family :)