I was due for period on Tue.?

and my cycle is pretty normal 28 days and I always seem to get my period on a Tue. or Wed. and I still have no period my are as sore as ever but don't have the sore nips lol likeall the other girls say they have and I don't usually get sore s around the time I am sup. to start usually a little tenderness a few days before but these are not just a little tender they're heavy and hurt but it comes and goes. I tried a test yesterday but it was neg. I am prolly going to try again on Sun. or Mon. but does this sound like I may be prego I have one child who is 18 months but i really don't rem. I think before I had more cramping involved and I don't have much of that just very mild mild pains so what do you think?