For the last month I've had what I think was a nervous breakdown of some sorts, because I wasn't sure about my future, my friendships, I didn't like the way I behaved with people, my indecisiveness and overthinkingand how I tend to avoid problems and I compared myself to others. I usually tear the skin from my head in very concrete points (this is not a big problem to me but I mention it in case it's useful) and sometimes when I'll talk about these things I'll start to tremble.
Since that happened (even though now I'm better- I don't have this feeling of hopelessness) I've had this constant tension in my chest (which I also kinda had before but to a lesser extent), I can feel my heart beating/racing when I'm resting and sometimes I will get these muscular spasms of which I hadn't had so much until now.
The thing is that yesterday I was talking to a friend about the way I behaved and so on and while talking to him it really didn't seem like much of a big deal and I felt so stupid about worrying about such a small thing, sometimes I have this feeling that I get my symptoms out of thinking about having anxiety, googling the problems and so on.

I don't feel right for feeling like this, because it seems that I'm self sabotaging in some way in order to delay me making things
Then, today I woke up and before I could think of anything I already felt my heart beating and the usual tension in my neck and chest. 

What is this? Is it real anxiety, a fleeting episode or am I just being too dramatic?