it could be from several things. i know for myself, anxiety and depression can create a lot of things including different ways of thinking at times even outside of dissociative reactions i have because it is anxiety driven which makes thoughts and feelings go in different directions when they otherwise might not.

it also might depend on your age and where you are in certain phases of your life as a lot of personal growth can cause similar types of uncertainty about who you are, what you want, what you believe, etc. which can also cause a degree of anxiety and confusion.

i would suggest talking to a professional who can give you more direction if you feel you are not able to cope with it on your own.