You'll have to decide at the table. The GM and players should talk it out and decide what makes sense, given how magic and dieties work in your world. Traditionally, the Bard and Paladin can only heal others and not themselves, I think... but there's no reason beyond 'tradition,' yeah?
You might ask the Cleric, "Hey, does your god allow you to heal yourself, or only others? It says 'allies' in the book, does that mean your allies, or allies of your god? What about, like, peasants?" Depending on your group, your Cleric, and the established fiction, these answers may vary.