Hello!

I need to know what my type is.I have some questions to ask:
-Do we born having the type:"WXYZ" or we become a member of this type due to life experiences?
-Can an F type be in fight with his feelings if he finds that they are obstacles relating to his abilities to understand things?Or if they make him suffer?
-I have strong sensations and strong intuitions,how can I know wether I am N or S?
-I was a bit extraverted during my childhood,and this is not the case at all now.But I am still inquisitive and I can open a long discussion with someone in order to get informations.In class I ask lot of questions.
-I am not well-organized due to my laziness.Does it implie that I am a P type.
-Tests usually give INTJ as a result...but I am not convinced because I am not ascetic,I have in fact a strong wing 7(I'm a 6)

I am really lost.

Thank you for your help!