It's part of your journey. Medical schools really do value you as a person, and I would mention it. It's not something that constitutes checking the disadvantaged box, though (not implying you would - just mentioning it for the sake of completeness). I noticed this year that one or two applicants were checking that box if they are international students or if they are the first to attend college in their family. Those reasons alone don't justify completing that section on the AMCAS form.
Good luck, and hang in there!