First of all, which Chamomile...there are several... and almost every
reputable aromatherapy supplier offers several different types..

There's roman chamomile...anthemis nobilis,  german chamomile, matricaria
recutitia,   Morrocan Chamomile (blue tansy) tanecetuum anuum,  "wild
chamomile"... ornemis multicaulis...  All with different uses, and not
interchangeable so do your research first.