Hi J., have you talked to your doctor about changing formula's? And about the poo? You should discuss both these matters with your doctor...
You can try wrapping your baby tighly in a recieving blanket before she starts screaming (if possiable). Something my Dr. told me with my first has always stuck with me and was of great help with my other two...remember for 9 mo or so your baby was in a warm, fluid, dark, peaceful place where all her needs were met all the time and it was easy for her to move around in...then as she grew it became a snuggly place. then all of the sudden she it trust out into a loud, bright, continually changing enviorment...cold wipes on the behind, clothes, lights, tv, radios, voices, textures...all are strange and can be overwhelming. IF she breaks down (screaming for no apparent reason) and trys to fold herself up put her in her softest, warmest sleeper, wrap her up, find a quiet spot and rock her gently, try even talking to her softly at that time and see if that helps you. It may take some time, but I know this has helped with our girls.
Never put anything in her formula without the doctor knowing or approving. They have found that introducing juices and cerals in formula and/or too early can cause allergies.
hang in there!! This too shall pass.