Evening out the Lines

I'm working on evening out my tan lines so I won't look like a dork in my bridesmaid dress in September. So far, it's not working out too well. On the left side of the photo, I'm a bit pink. And I'm actually peeling in the pink area. I use loads of sun screen each day, so I can't understand how this happened. In fact, I was appalled at this photo as it shows some red bumps on my face. I'm hoping that I'm not getting sun poisoning like so many in my family do. They get these horrible red bumps when they are out in the sun.