girlfriend found out i’ve been using concealer to hide the dark spots under my eyes. she’s been crying hysterically and won’t talk to me

like title says, today when we were hanging out in my room, my girlfriend happened to stumble upon one of my concealer sticks i use for my dark spots. at first she thought it was another girls or that i’ve must’ve been cheating on her or something so i explained to her why i had to it and why i used it. she honestly looked more disgusted the further i explained to her my reasoning. the vibe was totally dead after that though and she kinda left not that long after. i thought the whole thing was blown out of proportion so i ended up calling her and she was crying on the phone telling me how she “can’t stand being with someone living a double life” and that she “felt betrayed that i couldn’t confide in her”. i then again tried explaining that she’s taking this thing way out of hand but there was no reasoning with her. i’m truly confused on what to do