I am a 17 year old girl and I dreamt about having with my mom. I am disturbed and need help interpreting.?

For the record I am straight. I do not believe in masturbation and I have had a steady boyfriend and Boys flirt with me all the time. So I am definately straight. My mom is one of my best friends and I don't understand this. I haven's slept in three nights because I am afraid of having a recuring dream. I know about Sigmund Freud and I know I would not subconsciely think about having with my mom because that is disturbing. I really need help and I don't want to tell anybody.