I have been having some uncomfortable cramps, slight white mucus discharge, sore nipples and slight nausea when I first wake up, and mid day. I am not due for my period until the 16th. Any suggestions?

Have you missed a period yet?

This could be anything right now.

I am due the 16th.

You have to wait until after you miss a period to get fairly accurate results with a home pregnancy test. It's too early to tell right now and honestly, those "symptoms" you list could be anything at this point.

Those are signs of dozens of things, even sign the period is coming. At this point you have to just wait and see if you miss the period or not. ( the first real sng) if after you are two week late and no period, then you can do a pregnancy test