4 years brain fog from 15 to 19. But i!

Hello im 19 years old girl and when i was 15 i was always a happy, cheerful, kind girl and we just started living in our new house that time and one day i suddenly started to feel disconnected from everyone,lost,angry,cried, irritated and jealous and all but everybody in my family thought that this was happening with me due to phone use but i didnt used to watch phone much and then i didnt knew what the hell was happening with me so i accepted it i think because i don't know why i was feeling too scared and then i used too much phone and sleep less and couldn't able to sleep and feeling fake and lived being fake and disconnected from emotions, reality, people and myself or identity and then maybe i had brain fog and autopilot together so i studied with this thing while i was totally an average student and not interested in study at all still i studied and got good marks and not feeling doing study because of maturity, motionvations and all its been 4 years and i think im healing but i