Is talking to myself in front of the mirror a symptom of schizophrenia?

Hi doctor,

I am a 24 year old female. I am a healthy and happy person. I eat well and exercise well. I have a lot of friends, cool hobbies, etc. But, I have a weird habit. Whenever I am alone I talk to myself standing in front of the mirror. I imagine a lot. I think so many things like I am in an interview and I try to venture out the best answers and framing smart answers. When I am practicing on my guitar, I imagine lots of people are watching me and appreciating me for playing so well. I imagine futuristic conversations with people where I ask a question and answer them. When I am alone, I keep imagining some stuff. Also, I pick up some topic and start talking to myself in front of the mirror. I personally feel this habit has improved my communication skills, confidence and vocabulary. I am not shy and I do not have stage fear. When I meet my friends or when I am giving presentations at college, I am the one who used to stay very confident. However, some days back, when I was talking to myself in front of the mirror, my mom questioned me. Until now I did not pay much attention to what I was doing. But, ever since my mom saw me doing that I have become conscious. I have stopped talking to myself for two to three days. But, I do not feel like I have been missing out on anything. I am still friendly and confident. But, I am just wondering if I have crossed the line of sanity. I searched about this on the internet and came across something called as schizophrenia. Is this disorder setting with my habit? Do I have schizophrenia or any other disorder? To be honest, after reading about this schizophrenia I am very scared. It sounds like a very serious disorder to me. Please help.