Not being able to do anything. Atte!

I've been not able to concentrate on anything for a long time. I am 21 now. It all started when I was about 14 years old. It was hard to study in school and remembering things was really tough. It's funny because I was always the top ranker and suddenly couldn't pay attention on anything. It started to frustrate me and eventually after a year or so I started to have anxieties and fell into depression. I got into precious college and things only got worse. Since we had a lot of work to do every day and I not being able to submit works on time, I had to repeat a year of college. Later I was diagnosed with depression at 19 and got treated. I am not depressed anymore. But I still can't do my work although I really want to do it. People say it is just laziness. But only I know it's not. Things don't seem real and I procrastinate every single time I am given work.I am at the verge of losing another year of college and I really need help.I think I have atte