Transparent screen glitch

Yesterday, I used my laptop 3x during the day and on the 3rd time I got this weird transparant screen line on the right side of my laptop. It didn't fall, it is always on a table, there was no food or drinks dropped on it so no nothing happened for any damage to occur. Everything is working fine other than the transparant vertical line that is ruining my eyes.

I have tried to contact support but there is no way to get it as its limited and they have no email nor chat.

My laptop is the MacBook Air '13 and I have it for maybe 7 months now.