Sharp pinches?!

I have been cramping a little, boobs were sore a few days ago, they aren't too sore anymore, still swollen, I would guess about an inch, my nipples are super sensitive and areolas seem darker to me but hey, I could be imagining things. Any who not going to go on about my symptoms, I was supposed to start AF today but not here, been getting what feel like sharp pinches in my abdominal area, they only last for a few seconds and come and go. It feels nothing like gas pains and I don't recognize this pain at all. Took a test the 28th. It was neg. Going to take one this coming week sometime. Anyway just wanted some opinions about what it could possibly be and if anyone has experienced this and what was the outcome, AF or pregnancy..? Me and the hubby are trying so I'm waiting for that positive, don't want to get my hopes up to much though