Please have a physical from your doctor. See a neurologist perhaps. It's more common to begin early but stress has caused me to have symptoms beyond my wildest dreams so it's possible. And cash speaks from experience of having this happen in her 30's. I misinterpret things people say...mumbling in the background becomes an attack, but to my knowledge I have not heard voices that are not there. I had another scary symptom happen recently which terrorized me. I used to love hearing the birds singing in the morning but when I had a break recently the birds were harassing and mocking me. How silly of a thing to think right? But it was real and horrifying...I had to walk around with earplugs in. Sirens would blare and I was sure it was all part of a plot to drive me mad. I've never had this symptom before and I'm in my 40's! I do plan to have another brain scan though and I think you should too.