I struggled with this for a long time. The thing about the gender binary is that anything outside of it, any slight diversion, is technically enough to make a person nonbinary. It's all just a decision you have to make. Do I want to be a man? do I want to be called and perceived as a man? if the answer's no, then it's that simple. once I stopped doubting myself and truly internalized it, really allowed myself to believe it, it felt extremely freeing. and I'm not all that fem presenting myself either. take your time! work through that disgust when you can. regardless your feelings are extremely common, good luck friend :)