You have a slight forward lean on your lettering which is unusual for a lefty, although that's how we're taught to write. My mother said she was left handed when she was little but they beat it out of her in school, so she learned to write right handed but did many other things left handed.
My cousin was born lefthanded, broke his left arm in the second grade, and had to use his right arm to write. Today, he is ambidextrous and uses either hand equally well. He says it doesn't matter which one he uses.