17 and slightly concerned about this tummy line?

Hi Im 17 and I recently noticed this strange looking line on my tummy. I'm strapped down with school work so I don't get much exercise. I also eat normally (actually I stress eat a fair bit). I was just wondering if any of u had a similar line?

Everyone ur asked has no similar experience or they've memed me for 'trying to pretend to be fit'. Is this my rib muscle being squished? At my ribs forming to closely? what is happening???