I have been talking to myself a lot nowadays. I can somehow feel this change in my thinking. Since a last few years I've been recreating situations that almost match the real life background and living through them mentally. First I thought it was just my imagination but now it's getting me confused between the incidents that happened in real and in my imagination.I can feel both slowly mixing up because I am forgetting what had actually happened in reality and thinking my perception as what actually happened. I see myself in many worse situations sometime like me dying or hospitalized having some deadly disease and talk to myself creating proper dialogues to all the characters in my perception and soon start believing that perception really did happen.I have sudden head acha or blank mind. Nowadays I cannot concentrate properly. My brain is stuck to the task of figuring out throughout my life what exactly was a perception and what was reality.Please help. A few days back I started talking to my friend about the jokes we cracked in class during boring math lecture n how we had chatted on a sheet of paper like always n I clearly remember the jokes n how we had passed that sheet to another one of our friends n she could not help but laugh n when I started talking about it they said it never happened n the friend I was chatting was apparently absent to school that day.I remember keeping that chat sheet into my math book so on hearing that I checked it to prove them wrong n found absolutely nothing in my math book Last year when I was in 10th grade we had about a week holiday before our farewell party.One day I saw a perception of witnessing the farewell party all the even speeches announcement my batch mates talking everything.For three days I was living with the fact that farewell party was over until my friend came to my house saying if I had chose myself a dress for farewell. Once last year after my board annual exams of 10th grade we have about3 month long vacation.One day during the vacation I suddenly started studying thinking my exams weren't over n I was on my one month study vacation before exams. Its creeping me out.I dont even remember half the things that happened really.When i was talking to my friends a few days back about our manali tour i found out that more than half the things i thought happened there were just a part of my imagination. N then people claim im fake n lie to people where in reality i don't know which is the truth anyway. Please i need help!