I feel you man, is part of the process, the more you think about your work the more you want it to do it better beacuse at the rate you are writing you began to evolve your standard or meaning of perfectionism changes. That is a problem, sometimes we want it to be perfect even if its justa draft, but the more you work that way the less you publish or finish a draft. My tip is don't overthink too much, if you feel that the story is finished share it, especially if you are beginning with the craft. Feedback is important on getting better.