Using the ideas of Carl Jung, much of what we see in this dream are archetypes from the collective unconscious. However, the “you” in this dream is not an archetype but rather represents the dreamer’s ego. (In Jungian analysis, the ego is the center of consciousness.)
You and your dad are in a shop. In our conscious world, we obtain things at a shop. They are added to us. The things that we obtain in our dreams are often indications of psychological and spiritual growth. You obtain the snake.
The coral snake is probably related to increased spirituality or even kundalini. Its colors are probably important. The coral snake is typically black, red and yellow. The color red is associated with the 1st chakra while black would be the color of the lower realm. (This hints at the ability to travel to this lower world, which is a good sign.) Yellow is the color of the 3rd chakra, which is associated with the development of the ego. Being bit by a poisonous snake usually has a positive meaning. (FYI – In India, the cobra is a well known symbol for kundalini.)
Both you and your father were bit by the snake. He was bitten in the hand while the dreamer was bitten twice on the right index finger. The right direction is associated with the masculine, consciousness, the sun etc. In palmistry, the index finger is also known as the Jupiter finger. “Jupiter stands for guidance and ambition. This is the finger that shows the direction our life is taking and our sense of purpose.” http://www.palm-reading.org/five-fingers.html
Being bitten on the index finger may refer to the strengthening of the father archetype. But there are other sites with slightly different meanings. Thus, it looks like the index finger shows the dreamer that this is the direction of her life (or, at least, her direction in this dream). The dreamer was bitten twice, which increases this effect.
You and your dad reach this home (or perhaps a hospital). I have seen similar places in other spiritual dreams. In those dreams, the hospital can act as a rest area or a way station where the shaman rests and recuperates after shamanistic journeys.
You sent a text to your mother.
1. For a Jungian, your parents could symbolize the royal couple or sacred union, which is the joining of opposites.
2. Or it may be that your mother is a symbol of the great mother.
The death of the father archetype probably means that he is to be reborn as the male part of the royal couple (as mentioned above). The death of the dreamer means the death of her ego. The ego’s death is a common theme in shamanism.
Hope this helps.