Prior due but not period

So I have been trying to get pregnant with my partner.

During my fertile window I had sex at least 4 days in a row and twice a day.

Now my period is due however, & I’ve had the pain I usually have before my period starts which is sore nipples, cramps but no period. I’m not gonna get my hopes up cos I’ve been trying for so long.

I have white sticky discharge now, which I don’t usually get before a period. Does anyone else have this happened to them