I have suffered with mild anxiety and depression through most of my life. I've always kind of hidden it, although there are a couple of time where it affected my life and couldn't hide it. I used to self-harm, but haven't done that in years and years.
My anxiety mostly makes me scared of social situations. I tend to make up a lot of excuses why I can't go to things or see friends. Some of my friends think I'm a bit of a hermit or are lazy, but it's completely down to my anxiety.
About 16 years ago I had a few weeks off in high school, due to refusing to attend because of anxiety. Then a couple of years back I had a bit of a mental breakdown and had about 4 months off work with depression and stress. I was on antidepressants for about 7 months and then came off them by own choice. I used to be a teacher, but couldn't return to doing that after my 'breakdown', so got a different, less stressful job instead.