Is it normal that I'm not sure who I am.

i think alot of people will underestimate and claim to understand what how you feel, adn i think thats the worst part of it. that whenever, if you ever, tell someone tehy always say, oh yeh i know what you mean, but in reality they dont. Obviously just going by what you say and not knowing who you are, no one can ever say tehy understand, so when people on here say yourl grow out of it, thats not necesarily true. it soudns to me like you shuld read some philosophy, adn turn your pesimism and cynicism into an attempt to answer teh questions you seem to ahve no answers to. thats why im doing a philosophy degree, obviously you dont ahve to do that, just read stuff in your own time. Theres only two things you can do, but difrent ways to react to those options.
You can either accept that you feel like this and continue being unhappy, or accept it and find a way of making happiness or contentment out of it. or teh second option is to seek help, although all yourl get then is so called professionals talking their pre-determined bullshit abotu how youre 'ill' and 'depressed' and will try to treat you with counsilling and or drugs.
i can genuenly say i understand you, and i sought help and it was all shit, the drugs they gave me made me psychotic, and teh recreational drugs made it worse. eventually i came to terms with who i am and just cant wait until teh afterlife because that can only be better...