Normally my dd eats gerber for her food [when she has it, usually 1x/day] and eats stage 2. This time we bought beechnut brand. Well since Friday her sleeping at night has changed. The only way to get thru the night is to co-sleep with her otherwise she wakes up much more than before [like every 1-1.5 hr whereas before 1x-2x/night] could it be the change in brand that causes problem? or could it be something else?