Is it normal to self sabotage?

So I'm 21 years old, just finished my degree this month. I don't know why I always have these hesitant, weird thoughts in my head before I have to do a task where I'm not 100% sure about the outcome. I tend to procrastinate, even for important things and I keep feeling the need for someone to 'be there' for me. When I eventually get something done, it's after having psyched myself into thinking that only I can save the situation and this is my last chance to get things done. I hesitate and procrastinate with things like making important phonecalls, deciding whether to go out to big events and doing new things on my own. Since I am about to enter the world of work I really wanna shake this off and be more independent, but I'll probably put that off for later too.