Rosacea or lupus rash?

Hi. I'm a 32 year old white female, fair skin. About 4 weeks ago I noticed a red blotchy rash on the lower sides of my cheeks... C shaped and spotty looking, but with no discernible texture to the touch. The rash stayed on my face for about two weeks, fading in severity depending on time of day, etc. (It faded on one cheek completely but persisted on the other). Then, it began to present differently-- cheek redness as well as splotchy redness on chin, sometimes under nose, and occasionally across bridge of nose like a butterfly rash. This 'came and went' for about a week. However, last night was the worst its ever been. While eating dinner and drinking a beer, I felt my whole face flush hotly. I looked in the mirror and my whole face was bright red-- looked just like a malar flush (cheeks and nose), but also my chin and even my ears were bright red. The flush subsided after about an hour. What IS this? I thought it could be rosacea, but now I'm concerned about lupus. I did have my ANA and sed rate tested and both were negative, but I know this can sometimes be a finding in early stage lupus. Anyone have any ideas?