AF late

So this month we didn’t really track just went with the flow. I ovulated somewhere between the 13th and 16th, we did the deed before the 13th, on the 14th and on the 16th. My period is always on time but it’s two days late right now. My boobs have been sore and I was nauseous all day Sunday and Monday, but I took a test Monday and it was negative. I had a little light pink discharge Monday and today a little brown but no more since , is this a sign my period is coming? I’ve never spotted before my period so I’m not sure if that’s what this is or not. If it doesn’t come today would you retest again tomorrow?