Hi Ousaima,
the symptoms in healing peaks are similar to those in a stress phase, but come suddenly "out of the blue" (like after your anger situation) and take only a short time.
When they come as a stress reaction to an overwhelming chunk or a toxic chunk, the diarrhea has the purpose to relieve you of the poison or burden.
 In a healing peak there is probably no poison or burden anymore, but there was trauma energy left in the tissue to get rid of.
When your daughters reacted the same way, this is because they were in resonance with you. Did you mention they were babies still? Babies and small kids react very often on behalf of their mother/parents.