Im 3 days late today

I was supose to get my period on thursday its now sunday, my period is irregular but is there still a chance that i could be pregnant? I have sore breasts, always tired, and a couple days ago i went to the bathroom n wiped and there was very like pinkish blood so i figured i was getting my period n i put a tampon in and when i went to change my tampon it was dry withno blood n i havent had any bleeding sence.