My DH gets the exact same. One day I'm sure I'm pregnant, the next day I'm convinced I'm out, then I have a twinge and all of a sudden I'm back to being sure I'm pregnant lol. He really does have the patience of a saint.
Honestly your symptoms sound so promising! I don't want to get your hopes up but those feelings are what I always get before a bfp. Pinching, poking, stretching. Just generally feeeling that something's going on down there.
I'm not sure, I never get sore boobs in pregnancy, only time I've had them was while I was breastfeeding in the early days. Although I'm still very crampy. And my opk's still have lines on which is unusual for me after ovulation although I know that it can be normal.