If your child has been on Breast Milk for the last 7 months, she may very well have an adverse reaction to Formula.
You may want to change the brand of Formula you are giving her. My children had terrible diarrhea and rashes when I used "Carnation GoodStart" However, they both did very well when I change to Enfamil Lipil with Iron. You can give your child a specialty formula if her Pediatrician reccomends it. For example, Enfamil has Gentlese, which is easier to digest. You can get Free Samples of Formula from these companies instead of having to spend a lot of money on something you may not continue using.
Your Pediatrician may have coupons or Free Samples to give you as well.
Solids: Introducing Formula and new foods at the same time, may be too much for her body to process all at once.
When you introduce new foods, you should only give her one item at a time and wait at least 4 days before giving her another new item. Start with Squash, Sweet Potatoes, Carrots, and then the darker veggies should come later. Spacing out new foods will give you the time her body needs to assimilate the item and it will make it easier to pin point what may have triggered the reaction.
Squash and Apples tend to be pretty mild foods to give your baby while she gets back on track. Many young children tend to have allergic reactions to "Peaches and Appricots" for some reason.
Your Pediatrician can give you a referal to a "Pediatric Allergy Specialist" they can run test on children and determine if a child has any type of allergies even before the child is exposed to the "Allergen" that triggers a reaction.
I am a licensed day care provider and I am trained by the USDA Food Program on Child Nutrition. Always consult your Pediatrician regarding what might be a food allergy. Most children outgrow food allergies by the age of two.
I hope this information is helpful to you.
Go to www.zerotothree.org and click on "Parents" and then click on "Health and Nutrition" there you may look up Free Handouts for Parents on Food and Nutrition.
You may also e-mail me at ____@____.com