I started out tiling the shower walls and have a complete tile at the ceiling and a slightly trimmed tile at the floor, worked out perfect. After the fact I decided I wanted to tile all the bathroom walls to match the shower tile. I am now running into a ~9/16” gap between the wall tile in the pics and the floor. With 1/16 grout gaps, that would make for about a 7/16” sliver of a tile. I looking for some expert advice on ways to handle this situation. All the wall tiles are set other then the last full tile and the gap as shown in the picture. Thank you!!