Obviously I need to go to therapy, that would solve a lot of my issues, but for background, I am a university student who just graduated and is going into grad school. I came into uni an extroverted, no filter (honestly kind of annoying) guy, and now I'd like to think I'm a lot more calm and collected and I think things through more. 

However, with that increased level of thinking, now all I do is find myself second guessing every single possible choice I make, every action I take feels like a never ending debate in my head over whether it was right or wrong, I've had two bouts of insomnia in the last 3 months directly related to being nervous about things, and I tend to think of the worst possible outcome to every one of my choices.

I think this stems from how much I pressure myself to make the right choice every single time and to never make a mistake, I always end up thinking of backup plans upon backup plans for seemingly every possible thing that could or will go wrong. Right now I'm sitting on my bed with this deep anxious feeling on my back thinking of everything that could possibly go wrong with moving out of my dorm even though I won't be moving out until next year. I feel like I deluded myself into thinking this is actually a good thing, I mean we should think our choices through right? But at this point it's got a grip on me and it's dragging me down immensely, yet all I can do is try to endlessly have debates with myself about whether or not what I'm doing is right.

I don't know if this is just something that happens when you get older, or if it genuinely is anxiety. But at this point, it's become such a burden that i can't remember the last time I was free of this nervousness, second guessing, and well... anxiety.

Does anyone have any tips with dealing with these kinds of feelings? I find myself stuck in loops and loops of the worst possible outcome in my head over and over and it frankly sucks.

Of course, I'm not looking for a diagnosis or anything, I just thought I'd feel a bit validated on here.