What happened to me? (i think it was some sort of mental breakdown).

That my friend is what is called a panic attack...it's not a mental problem at all. I have them all the time, but their are ways to get help for anxiety. Although you would be going to see a pyschiatrist to get medication to treat anxiety that doesn't mean there is anything wrong with you. Almost everyone I kno has anxiety, and has had few panic attacks in their life. It's a worldwide thing...happens to everyone. Nothing to stress over. I'm borderline anti social depending on my mood. I understand completely what your going through..it's just something that's all in your head. Most anxiety problems are cause by the people themselves that are having them. It's up to you to have the strong will to get through them. Your not alone...hope i helped a little...if you have any other questions just ask...I have anxiety everyday of my life..almost all day everyday..so if theres anybody that knows about this kinda stuff it's me..so feel free to ask..