Can your fears effect your dreams?

If you went to sleep thinking about the thing you are afraid, especially if the fear is about something you have to do, then yes definitely. If you just have a fear of something like heights then it is possible to regularly have dreams about your fear. These can range from facing your fear to being made to do something that increases your level of fear or even something like you dream you are seeing a psychiatrist or someone that can help you deal with it