J.M.
Well..I don't know about the rash or whether or not she is allergic to the chick peas but I have been told by my ped that, of course, formula is the best food for baby until 12 months anyway...so, if they go a few days without eating food but theyre getting enough formula then it wont do them any harm. As long as she seems like she's getting better and she's still taking her formula with no problems, then I say just keep doing what youre doing.
Youre doing a good job!
& Good Luck!!