Dreams

Assalamu alaikum,
Respected Mufti Sahab, I want to ask a few questions which is bothering me a bit.

1. I want to know how to get of a bad dream and its effects. Suppose someone has seen a bad dream, so does not want that dream to come true in the real life, so for this what steps and action can be take so that one becomes safe from the bad effects of the dream.

2. Suppose someone saw a dream and has asked an alim about its interpretation and the alim gave the interpretation. Then the same person who saw the dream asked another alim for the interpretation of the same dream and that alim gave a different answer of the dream than the previous alim. So which interpretation will be correct and could come true and whom to follow.

3. What are the times during the day or night and months and seasons when dreams are best and can come true? Does dreams have any role in our lives.

4. Can you name the book and the author, from where you interpret dreams so that we may buy it and can read it ourselves.
Jazzak Allah!