thats life,
What you are experiencing is perfectly normal. Most of the working population on this little blue pearl experience stress every day, in one form or another. What matters is how you deal with it, and yes, some people are more susceptible to it than others. Seeking help and talking to people about it is the best thing you could have done.
Take the time to learn about stress. Learn about anxiety. Understanding your problem will help you manage it.
I've had my own battles with stress and anxiety in the past, and it took me a long time to shake off those shackles. Over-thinking and dwelling on your problems will only make them worse. Again, over-thinking and dwelling on your problems will only make them worse. For me it was just a case of letting go. What worked for me? Not giving a f*ck. I let go of my problems before they consumed me, and i've never felt better.
It gets us all, my friend; stress is a perfectly normal part of being human - just don't let it control you.
All the best.