Was wondering if absence of tenderness in early pregnancy is okay?

My cycle has been like clockwork for the past 10 months. One month it comes in 27 days and the next it's 25. Yesterday was day 25(and I was supposed to get my period) but I still haven't. I've been feeling quite bloated and crampy, but my don't hurt like they do before I get my period, which is really bad, incidentally, they are swollen however. I took a pregnancy test before I was supposed to get my period and it came up negative, do any of you ladies think it's possible I could still be pregnant? My fiance and I have been trying since August. Any comments would be helpful...