Did I mess up my lower lateral cartilage? Should I see an ENT?

Hello and thank you for your question. An in-person examination would be the only way to answer this.   I recommend that you seek consultation with a
qualified board-certified plastic surgeon who can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

I think more details are needed, but if you are concerned about a specific issue with your nose, then it seems reasonable to have it evaluated.

An examination from a rhinoplasty surgeon can determine if you indeed have caused any damage to the lower lateral cartilages or ligamentous structures of this portion of your nose. Manipulation, as you have described, can be harmful to the normal cartilage structures and/or stretch the support ligaments. Please try to avoid any further manipulation to your nose and be seen by a physician for recommendations. Good luck.