Lines under gums?

I brush 2-3 times a day, floss 3-4 times a week, use mouth wash 1-2 times day. I even use salt water and hydrogen peroxide 2-3 times a week. My gums do not bleed unless I floss very hard. However, I have lines under my gums. Should I be worried? Picture should be attached. Thank you so much! 

It looks like maybe you have some inflammation happening.  I'm not dentist, though - that's just my unprofessional opinion.  Perhaps you're overdoing the dental hygiene.  I would see a dentist to get a definitive answer.  You don't want to take chances.  Good luck.

Do you have digestion issues? Or acid reflux? I know these can irritate the gums.

Not that I can say of. Maybe just gas but who doesn't lol. But I never get heart burn, or acid reflux. the most acidic thing I drink is probalby orange juice.