“…going to write about [anxiety] in a personal statement to the schools I apply to.” Please (re)consider carefully. It’s not a tip to have serious anxiety and adcoms tend to prefer top performance over “reasons” an applicant didn’t do well.
This EC is interesting. But alone, it can’t tip you into a tippy top.
Posters are right that the grades you did earn will matter to adcoms at a Columbia or NU. As well as how you chose primarily easier courses. And still got a B and a C, besides the C and F in French.
Language weakness is sometimes excusabale, but not when in the midst of a light courseload and a direction that can expect foreign language skills of some sort.
So with this record in this context, adcoms at a C and NU may think the EC is a major distraction. They want to see the patterns that scream, “I can succeed at your tough college, academically and otherwise.” In elite admissions, the focus isn’t on your future career ideas.
In the immortal words of my mother: Just get the degree. Forget the shiny colleges, revisit them for grad school.