So we have Been ttc for about 2 years now off and on with pcos and irregular/ no periods. and at this point in time we had decided that after an up coming trip we would proceed with an <a href="https://glowing.com/glow-fertility-program">iui</a>. For the past 3 weeks I have had VERY sore nipples and for about 2 weeks I have had what are like period cramps yet no period in sight. Took a pregnancy test and it came back negitive. What could it be?