Little pink dot on back facing camera

I don’t know why but it started just the other day. Whenever I go to take a photo on the camera app there is a little pink dot thingy in the bottom left corner and it also shows up in the photos. It doesn’t appear when I switch to video but there is still a very faint horizontal line at the same height as the dot. It’s not a light leak and if I zoom in or zoom out enough it goes away but on 1x it’s clearly visible. I’m also fully updated so I’m assuming I should just take my phone into the shop but I would like other opinions. I don’t know why the first two photos are flipped but it’s in the bottom left corner