No. It isn’t normal. I’m so sorry that you are haunted by these thoughts and nightmares. I don’t have enough information to determine if you were actually sexually abused more than the incidents you mentioned or if you were so anxious you (or your mother) might be assaulted that you developed the behaviors that are common in victims of trauma.
When little kids feel threatened, they can’t leave physically. They are dependent on the very people they fear. So they “leave” in their heads. I have a guess that is what happened to you. You feel safest when you are at home or in your daydreams.
Even though you are older now and can probably fend off unwanted advances, you became so convinced you will be hurt again you haven’t been able to let go of your old coping strategies and develop new ones. Again, this isn’t uncommon in traumatized kids. You may meet the criteria for Post Traumatic Stress Disorder (PTSD).
To get free of your past, you would benefit from seeing a therapist who specializes in childhood trauma. If you can’t get to a therapist, do some reading to learn more about the effects of trauma and how you can help yourself. Join one of the forums here at PsychCentral for some peer support.
You are only 25. You deserve to have a life that includes friendship and love. You deserve to walk confidently in the world, free of the anxiety and fears.
Please follow up. Get yourself the help you need to live the life you were meant to live.
I wish you well.