You could be pregnant yes, previous month I was 11days late... took 2 hpt and both came out negative. Then after my period I had this heavy feeling in my abdomen, like my cervix was too full. Every time me and my husband has sex I had this feeling he was bashing into something every time(sorry tmi) and I instantly knew something is up. By last Sunday morning I was yet again 9 days late and I did 2 hpt, both came out positive instantly. So wait it out a bit to see what happens with your period, if it still haven't made an appearance in a weeks time take another test. No one knows our bodies like us. Good luck