I've had some of that--crampy during the time between conception and finding out I was pregnant. I haven't had the tingly thing, but i've still been nursing the last two times i've gotten pregnant again. I do remember that with my second pregnancy, I didn't get sore breasts, which confused me a little--that was such a big pregnancy symptom for me the first time around. I've heard though, that in subsequent pregnancies your breasts don't hurt.
Certainly the nausea and increased cm are good signs that you could be pregnant. Hope you're ok with it, 'cause I bet you are!! You could probably take one of those early response tests (up to four days before your periods' due).
Good luck!