It's quite tacky to try to explain someone else's dream, so i'll just say what i know of the symbols or what it'd make me think if it were my dream. What restin said about the symbols is correct from the western and christian perspective, but if we go further, to the meaning of the snake in the collective psyche and some of the eastern traditions, its meaning becomes much more positive. The snake symbolises the transcendance, as each being living in two different worlds/elements. This is according to Jung, but there are also many other examples where this theory is confirmed, like in the shamanic visions with ayahuasca, where they often encounter snakes. For some people it can indeed mean facing their fears and negative emotions they experience, but for the shamans themselves there are many snakes in their visions that are considered postive and represent wisdom and consciousness, helping them in their healing practices. Also in the chinese astrology, the snakes are a symbol of wisdom. The sign for the pharmacies is also a snake, representing health.
I don't know much about the symbol of the apostle, it can be, as restin said, a symbol for purity, innocence, holiness, but it could also represent something like religious authority or dogma.
As you see, we can completely turn the meanings around, depending on the perspective.
