Personal question about breasts

Kayla
Ok so my periods are irregular and I got a negative blood test on Thurs. But for the last two weeks every so often my boobs will ache and when I check my nipple/areola area, one part of it is like swollen and poking out like a knot but it's soft. And the rest of the area looks regular. I've also been having sharp on and off pains in my pelvic/abdominal area for a few days. All HPTs are either negative or a slight positive that goes away after 10-20 min. Has anyone else's nipples done that without being pregnant? Ive felt weird the last couple weeks and even experienced spotting after when I think I ovulated. Didn't take a test with my daughter til CD 41 and it was a faint positive then. I'm currently on CD 39 but was wondering about the nipple thing. Any info or personal experiences are welcome. Thx!