What could this rash be from??

Victoria
This rash appeared on my right cheek today. My other cheek has a couple bumps as well, but not like this one. I've been noticing little bumps over the past couple days but now my whole cheek is inflamed and itchy/painful. It was the worst when I got out of the shower. I didn't use anything different than usual and washed my face with my normal face wash. The only thing I've done differently lately is skipping my placebo pills in my bc and starting the next pack and I didn't have any soda yesterday (which is something I have once every day). It doesn't sound like those things could cause this. I also have never had acne-prone skin. Any ideas? Thanks.