This Feeling... Again

I'm having this fucking feeling again.  Like everything is not going my way and the universe is conspiring against me.  I can't write, my chest hurts, and I just want to hit something.  It's awful.  And I hate it.  I don't want to feel like this but I can't help it.  I'm only human.  All of us have that little green monster inside that's just waiting to be unleashed.  I keep a very tight leash on mine because I know how bad it would go if I let it roam freely.  But sometimes, just sometimes, it simply gets the better of me.  
It makes me want to give up and just say 'to hell with it all'.  It's like nothing comes out of all my effort.  If that's the case, then what's the point of all these?  What am I even doing?  But of course, I can't think like that.  Because if I do, then everything will be over.  And I can't simply let that happen.  So I will continue to fight and fight and fight some more.  Until I reach my goal and get everything I ever wanted.