MCPE crashed, now i have a virus (?)

I was playing on the PrimeGames server in Creative. I rotated my phone from horizontal to vertical and the game glitched out on me. There was a cursor in the part of the screen that was glitched and I tapped it on accident. Now I have this slightly transparent bar on the right side of my screen (as seen in first picture) and when I click on it it takes me to a bunch of ads (as seen in second picture). I don't know how or why this happened, or how to remove it. I could just live with it, or even go as far as resetting my phone, but I really don't want to as I have a lot of pictures, artwork, and videos I wouldn't be able to recover. If you cannot do anything to help me, that is fine, and I understand.