For quite a few months (maybe a year?) I've struggled quite badly with this and could really use some help. 

Some background: I'm 18 years old and I had a pretty rough childhood which has manifested itself as anxiety. Tight chest, constant worrying, horrible sleep problems, the whole nine yards. Despite the anxiety, by far the worst part is the CONSTANT depersonalization I experience. I don't remember what feeling "normal" is like anymore, I don't think clearly, my head has constant pressure in it, both me and everything else don't seem real and I just feel fucking weird. I'm worried that it's something else like onset schizophrenia or something but I don't exhibit any symptoms of that. It's getting to the point where i'm just miserable all the time and need to figure something out.  It doesn't ever completely subside, sometimes it's just not as bad. 

To anyone who has struggled with this, or is struggling, how have you helped it?  Is there anything I can even do?

Thanks to all who read this, and double thanks for any replies.