Plan B

So I recently took plan B about a week and a half ago. I was ovulating and I think the condom had broke and I didn't want to take any chances. I just got my period 8 days early and it's severely lighter and it's like a dark red. My period is usually regular - once a month, lasts 4 days light (not too light), and I ovulate exactly 14 days from the last day of my period. Anyways is normal that I got mine early and it's light? Also I workout out a lot so that might be it but idk
UPDATE: This is the second day and I've been noxious but like it comes and goes. Is this normal?