Help me ladies!!

Okay so! Here goes.

I was supposed to start my period a rough the 10th of march, I remember spotting and thinking to myself oh I'll start tomorrow (I usually have a light pink warning the night before) but I didn't get it. I still haven't got it. I forget some mornings to chart my bbt, but on the days I do remember it's normally 96 or 97° since March it's been 98°. My bf is also pointing out every time I have a mood swing. My breasts are sore like right before you start, but worse. It started with my nipples feeling raw, and then spread. Every test I take is negative. So I do t know what's going on. Or if I'm making this all happen? Could it be a possible reset in my cycle? Help PLEASE!