Is it too early to take a hpt?

I have really sore breasts and had sex multiple times during my peak fertility timeframe, but AF isn't supposed to come until next week. I haven't been <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> so I'm not sure how many DPO I am exactly.  I've never had sore breasts before my period - should I test now or just wait?