I agree with CartoonWatcher. I have artist friends who work so hard on a piece, or even entire comics, but stress themselves out because even when they give 10,000% they can't please themselves. The they show the rest of us the work (or even show it to each other) and turns out it's done really well, but they can't ignore the negative aspects that the rest of us don't even notice are there.
Relax dude, take a deep breath. Why don't you show me some of what you have and let me take a look? Sometimes having an outside opinion can help, artists who are isolated seldom put out work because they're never truly satisfied with themselves. That's something I've learned recently.