My dream FREAKING TRICKED ME!! ?

So today I decided to take a nap and test if I could control my dream. I intended it to be short, but I slept for 4 hours. I vaguely remember it, but I couldn't control it. When I woke up, I was confused and talking to my sister (who came into my room around the time I woke up) about something, but I knew it wasn't in my dream. I knew what I told her wasn't in it. I fell asleep again when she left, but didn't dream. Later on, my sister said that I sounded mental when I was talking to her. How could my mind trick me?Did my subconscious know I wanted to control the dream?