Very light pink discharge/spotting?

I just went to the bathroom to see a very small amount of pink discharge or spotting, I'm not sure which. It looks like a neon highlighter.
Does this mean my period is coming? I've already had ovulation, and there is not a chance I could be pregnant. I also had mild cramps today, and I was moody yesterday. Oh yeah, and my boobs have been sore for about a week. Just making sure!