It could be dangerous game you are playing. I'm sure you know, trading is a risk control game, not a conviction game. I am assuming stepping up your size was consistent with your risk control plan. If not stepping up size based on conviction is, I believe, planting seeds for future trouble.
The most common way to eliminate fear in trading is to change your beliefs/attitudes towards the market, by creating new more purposeful beliefs through positive experiences. Step by step. Then it is not a matter of jumping in and being brave and fighting your fear. You just do it. Because thats who you are.
Is your trade of 100 lots a "belief to prove yourself" expressing itself? If so, congratulations for identifying it. Examining it and creating new more purposeful beliefs to help achieve your goals could be in order. That is what successful traders do.
If not congratulations for your achievements.