From the day you are born you have thoughts, thoughts of hearing parental persons talking around you. You also have thoughts about the future and past no matter what age you are.
My thoughts are what is unique only to me, and since having paranoid schizophrenia, I find it hard to decipher what is my own thoughts and that of voices.
We are not alone in this world and persons with mental breakdowns with reality, are those who find it hard to sometimes make friends, make travel arrangements and a host of other things.
I only wish that those like me talk to specialist doctors to get a medical leave from absence from work until you feel fit enough mentally to go back and do what it is that you do.