What kind of mental condition is this?

For the past month and a bit, I have had high anxiety w/ depression. It's really stupid as my anxiety dwells on GRAMMAR and READING. Before this time, I was very happy and didn't pay that much attention to little things such as reading and grammar. But now, I have begun to obsess about the smallest things. For example, if I don't know what type of sentence or grammar something this, I begin to freak out and panick. I also get the fear of becoming illiterate and slow at reading tests because the obsessions or so distract me a lot. They cause me a lot of distress. I have no idea how this all start, but I feel really bad. It's been so long, anyone have a clue to what this condition is?