anxiety !!

I'm not sure what it is but as I'm getting older I'm getting Terrible anxiety!! I'm 18 and it's my first year of college and I recently just got my first job and yes I'm stressed but I'm just riddled with anxiety. I just feel like whenever someone says something bad to me it like breaks me and makes me cry and gives me Terrible anxiety. I use to always be a great public speaker but I did a presentation at school on Thursday and I got such bad anxiety my voice was shaky and I was about to cry. As I've gotten older my anxiety is so bad and I don't know why !! Has anyone else felt this way ?? And does it have to do with age ?